Other

Estimate BMR and TDEE with Mifflin-St Jeor, Schofield, or Henry (UK SACN) equations, and see whether your age fits the equation you picked.

Estimate a mean with a two-sided t confidence interval from sample data and a chosen confidence level. [nist-confidence-limits-mean]

Estimate what a trip or a charging session costs on electricity versus gasoline, using your own rate, efficiency, and battery size.

Calculate the heat index, how hot it really feels, from air temperature and relative humidity using NWS formulas.

Find the least common multiple of two positive integers using the page's greatest-common-factor rule. [calculatorsoup-lcm]

Enter loan amount, APR, and term to calculate your monthly payment, total interest paid, and total amount repaid.

Turn a Z, t, chi-square, or F statistic into a p-value, see the decision at your significance level, and check if it is borderline.

Percent difference calculator with a staged formula and source-labeled examples. [calculatorsoup-percent-difference]

Estimate collected rainwater from catchment area, rainfall depth, and runoff coefficient with staged formulas, examples, and clear limits.

Calculate rectangular area from entered dimensions, with input guidance, source-labeled examples, unit notes, and clear limits.

Work out the minimum sample size per group for comparing an average or a rate, one group against a target or two groups against each other.

Estimate the survey responses and invitations you need for a percentage or average, based on confidence level, margin of error, and response rate.

Enter three known parts of a triangle — sides or angles, in one of four combinations (three sides, two sides and the included angle, two angles and the included side, or two angles and a non-included side) — and get every side, angle, the area, and the perimeter.

Calculate wind chill from air temperature and wind speed, then read source-based guidance on cold, frostbite, and hypothermia.