Feet Per Minute to CFM
Convert air velocity in feet per minute to airflow in cubic feet per minute. Enter the velocity and cross-sectional area, then select the area unit.
WPcalc – Wise People Calculate
Explore 1290+ smart online calculators for life, health, science, finance, education, and everyday tasks. Designed for accuracy, speed, and real-world usefulness — all in one place.
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Area of Rectangular Duct
Enter the side dimensions, length and quantity of a rectangular duct to get the total sheet-metal surface area, connector strip (shina) length and corner piece count, with an optional seam allowance.
Golden Ratio Face
Compare eight facial measurement ratios with the golden ratio. Enter the 12 distances shown in the calculator to see their average ratio and how many fall within the calculator’s target range.
Hardy-Weinberg Equilibrium
Enter observed counts of homozygous dominant, heterozygous, and homozygous recessive individuals to calculate allele frequencies (p and q), expected genotype frequencies, and a chi-square statistic that tests whether the population is in Hardy-Weinberg equilibrium.
Nichrome Wire
Calculate the resistance, current, and power of a nichrome wire from its diameter, length, and applied voltage. Useful for designing heating elements, foam cutters, hotends, and DIY heating coils.
Circle
Enter one known circle value — radius, diameter, circumference, or area — and instantly get all the other dimensions. Choose your preferred unit and the calculator does the rest.
Multiplication
Multiply two or more numbers instantly. Enter the count of numbers and their values — whole numbers, decimals or negatives — and get the product with a step-by-step example.
Trigonometry
Calculate sin, cos and tan of any angle in degrees, radians or gradians — or enter a ratio and find the angle using arcsin, arccos or arctan.
Age Calculator
Enter a date of birth and a comparison date to calculate age in years, months, and days, total time elapsed, and days until the next birthday.
Safe Days
Enter the first day of your last menstrual period, your cycle length, and your menstruation duration to see a calendar of estimated menstrual, fertile, and lower-fertility days. No day is guaranteed safe from pregnancy.
Addition
Add two or more numbers quickly and accurately. Enter how many values you want to sum, type them in, and the calculator instantly shows the total.
Reincarnation by Date of Birth
Enter your name, gender, and date of birth to get a playful prediction of your next incarnation. The result is chosen from a fixed list of animals and humans.
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