{"id":67147,"date":"2026-10-20T09:51:57","date_gmt":"2026-10-20T06:51:57","guid":{"rendered":"https:\/\/wpcalc.com\/en\/?p=67147"},"modified":"2026-10-23T17:07:00","modified_gmt":"2026-10-23T14:07:00","slug":"inflation-calculator-value-of-money-over-time","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/finance\/inflation-calculator-value-of-money-over-time\/","title":{"rendered":"Inflation Calculator \u2013 CPI Value of Money Over Time"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Compare the Value of Money Across Years<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"67147\" data-favorite-title=\"Inflation\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/finance\/inflation-calculator-value-of-money-over-time\/\" data-favorite-excerpt=\"Compare the purchasing power of a dollar amount across years using historical US inflation, or enter your own annual rate to estimate a future or present equivalent.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-investment\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/en\/finance\/inflation-calculator-value-of-money-over-time\/\" method=\"POST\" class=\"calculator\" id=\"calculator-67147\" data-post=\"67147\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field\" id=\"input-1\"><label for=\"field-1\">Calculation mode<\/label><div class=\"grid grid-cols-1\"><select id=\"field-1\" name=\"calculation_mode\"><option value=\"cpi\" selected>US CPI (historical)<\/option><option value=\"custom\">Custom rate<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-2\">Amount<\/label><input type=\"text\" name=\"amount\" id=\"field-2\" aria-describedby=\"calc-unit-2\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"1000\"\/><div class=\"unit\" id=\"calc-unit-2\">$<\/div><\/div><div class=\"field\" id=\"input-3\"><label for=\"field-3\">Start year<\/label><input type=\"text\" name=\"start_year\" id=\"field-3\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1913\" max=\"2025\" value=\"2000\"\/><\/div><div class=\"field\" id=\"input-4\"><label for=\"field-4\">End year<\/label><input type=\"text\" name=\"end_year\" id=\"field-4\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1913\" max=\"2025\" value=\"2025\"\/><\/div><div class=\"field\" id=\"input-5\" hidden><label for=\"field-5\">Average annual inflation rate<\/label><input type=\"number\" name=\"average_annual_inflation_rate\" id=\"field-5\" aria-describedby=\"calc-unit-5 calc-info-5\" step=\"0.01\" value=\"3\"\/><div class=\"unit\" id=\"calc-unit-5\">%<\/div><small id=\"calc-info-5\">Enter a rate greater than \u2212100%. A negative rate represents deflation.<\/small><\/div><div class=\"field\" id=\"input-6\" hidden><label for=\"field-6\">Number of years<\/label><input type=\"text\" name=\"number_of_years\" id=\"field-6\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"10\"\/><\/div><div class=\"field\" id=\"input-7\" hidden><label for=\"field-7\">Direction<\/label><div class=\"grid grid-cols-1\"><select id=\"field-7\" name=\"direction\"><option value=\"future\" selected>Future value of today&#039;s money<\/option><option value=\"present\">Today&#039;s value of a future amount<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"67147\">Calculate<\/button><button type=\"reset\">Reset<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calculate automatically<\/label><small>If enabled, the result will update automatically when you change any value.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Your Results<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Equivalent amount<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"$\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Cumulative inflation<\/span><\/span><span class=\"field-value\" id=\"result-2\" data-unit=\"%\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-3\"><span class=\"field-title\"><span>Average annual inflation<\/span><\/span><span class=\"field-value\" id=\"result-3\" data-unit=\"%\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-4\"><span class=\"field-title\"><span>Purchasing power lost<\/span><\/span><span class=\"field-value\" id=\"result-4\" data-unit=\"%\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copy link to this calculation<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Leave a Comment<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"67147\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">How did this result make you feel?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Like <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">Helpful <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confused <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Disappointed <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Inaccurate <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>Inflation Formula<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">Formula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[E=A\\frac{C_e}{C_s},\\qquad I=\\left(\\frac{C_e}{C_s}-1\\right)100\\%,\\qquad R=\\left(\\left(\\frac{C_e}{C_s}\\right)^{1\/n}-1\\right)100\\%\\]\n\\[E_{\\text{future}}=A\\left(1+\\frac{r}{100}\\right)^n,\\qquad E_{\\text{present}}=\\frac{A}{\\left(1+\\frac{r}{100}\\right)^n},\\qquad L=\\left(1-\\frac{1}{\\left(1+\\frac{r}{100}\\right)^n}\\right)100\\%\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(A\\) \u2014 amount entered, in dollars<\/li>\n<li>\\(C_s\\) and \\(C_e\\) \u2014 annual-average US Consumer Price Index (CPI) values for the start and end years<\/li>\n<li>\\(n\\) \u2014 number of years between the dates, or the number of years entered in custom mode<\/li>\n<li>\\(r\\) \u2014 custom average annual inflation rate, in percent<\/li>\n<li>\\(E\\) \u2014 equivalent amount; \\(I\\) \u2014 cumulative historical inflation; \\(R\\) \u2014 equivalent average annual historical inflation rate; \\(L\\) \u2014 purchasing power lost at the custom rate<\/li>\n<\/ul>\n<p>Historical mode scales the amount by the ratio of the two annual CPI values. Custom mode applies the same annual rate each year, either compounding forward or discounting a future amount back to today.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-459\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Inflation \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> The default settings compare $1,000 in 2000 with its equivalent in 2025. The calculator uses annual-average CPI values of 172.2 for 2000 and 321.943 for 2025.<\/p>\n<p>\\[E=\\$1{,}000\\times\\frac{321.943}{172.2}=\\$1{,}869.59\\]<\/p>\n<p>\\[I=\\left(\\frac{321.943}{172.2}-1\\right)100\\%=86.96\\%,\\qquad R=\\left(\\left(\\frac{321.943}{172.2}\\right)^{1\/25}-1\\right)100\\%\\approx2.53\\%\\]<\/p>\n<p><strong>Result:<\/strong> $1,869.59 in 2025 has approximately the same purchasing power as $1,000 in 2000, according to the annual-average US CPI. Cumulative inflation is 86.96%; the equivalent average annual inflation rate is about 2.53%.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>Choose <strong>Calculation mode<\/strong>. Select <strong>US CPI (historical)<\/strong> to compare two years in the calculator\u2019s dataset, or <strong>Custom rate<\/strong> to use an inflation assumption of your own.<\/li>\n<li>Enter the <strong>Amount<\/strong> in dollars. This must be zero or greater.<\/li>\n<li>For historical mode, enter a <strong>Start year<\/strong> and <strong>End year<\/strong> from 1913 through 2025. Use whole years, with the start year before the end year. The result is the later-year dollar amount with approximately equivalent purchasing power.<\/li>\n<li>For custom mode, enter the <strong>Average annual inflation rate<\/strong> and <strong>Number of years<\/strong>. The rate must be greater than \u2212100%, and the number of years must be a nonnegative whole number.<\/li>\n<li>In custom mode, set <strong>Direction<\/strong> to <strong>Future value of today\u2019s money<\/strong> to estimate the later-year amount needed for the same purchasing power. Choose <strong>Today\u2019s value of a future amount<\/strong> to express a later-year dollar amount in today\u2019s purchasing power.<\/li>\n<\/ol>\n<p>Read <strong>Equivalent amount<\/strong> as a purchasing-power comparison, not an investment balance. Historical mode also reports <strong>Cumulative inflation<\/strong> and <strong>Average annual inflation<\/strong>. Custom mode instead reports <strong>Purchasing power lost<\/strong> at the rate and duration entered.<\/p>\n<h2>What inflation does to the value of money<\/h2>\n<p>Inflation is a rise in the general price level over time. When prices rise, a fixed number of dollars typically buys less. The equivalent amount answers a practical question: how many dollars at one point in time would have roughly the same purchasing power as the amount entered at another point?<\/p>\n<p>In historical mode, the calculator compares annual-average values of the US Consumer Price Index for All Urban Consumers (CPI-U). If the end-year index is 50% higher than the start-year index, an amount in the end year must also be 50% higher to match the earlier amount\u2019s CPI-based purchasing power. Cumulative inflation describes the total change across the period; average annual inflation expresses that same total as a constant compounded yearly rate. Actual inflation need not have been the same in each intervening year.<\/p>\n<p>Custom mode is useful for planning rather than looking up a recorded change. For example, an assumed 3% annual inflation rate increases the future cost of an item each year. The reverse calculation discounts a specified future amount into today\u2019s dollars. <strong>Purchasing power lost<\/strong> measures how much less a fixed dollar amount would buy after the stated period at the assumed rate; it is not the same percentage as the increase in prices.<\/p>\n<p>Inflation and investment growth are separate. An account balance could grow while its purchasing power falls if returns do not keep up with prices. To project a balance using an interest rate, use the <a href=\"https:\/\/wpcalc.com\/en\/finance\/compound-interest\/\">Compound Interest Calculator<\/a>. You can compare a beginning and ending value as an annualized growth rate with the <a href=\"https:\/\/wpcalc.com\/en\/finance\/compound-annual-growth-rate\/\">Compound Annual Growth Rate Calculator<\/a>.<\/p>\n<h2>Assumptions and practical limits<\/h2>\n<ul>\n<li><strong>Historical coverage:<\/strong> The CPI dataset covers 1913\u20132025. Historical mode compares an earlier year with a later year; it does not accept the same year twice or reverse the year order.<\/li>\n<li><strong>Annual averages:<\/strong> Each historical index represents a full-year average, so the result does not describe purchasing power on a specific day or in a specific month.<\/li>\n<li><strong>US-wide measure:<\/strong> CPI-U tracks a broad basket of consumer goods and services. Your expenses, location, or a particular item may change in price at a different rate.<\/li>\n<li><strong>Constant custom rate:<\/strong> Custom mode compounds one rate for every year. Real inflation varies. Entering a negative rate models deflation and can produce a negative <strong>Purchasing power lost<\/strong> result, indicating a gain instead.<\/li>\n<li><strong>No investment return:<\/strong> Equivalent amounts do not include interest, taxes, fees, or changes in wages. For a savings projection with contributions or returns, use the <a href=\"https:\/\/wpcalc.com\/en\/finance\/savingsinvestment\/\">Savings \/ Investment Calculator<\/a> separately.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Compare the purchasing power of a dollar amount across years using historical US inflation, or enter your own annual rate to estimate a future or present equivalent.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[27],"class_list":["post-67147","post","type-post","status-publish","format-standard","hentry","category-finance","tag-investment"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=67147"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67147\/revisions"}],"predecessor-version":[{"id":67512,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67147\/revisions\/67512"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=67147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=67147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=67147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}