Free Online Calculators That Make Complex Math Simple

Instant weighted and unweighted GPA estimates.

Estimate your final grade based on exam weight.

Find the score you need on remaining work to pass.

Average assignment and test scores quickly.

Convert correct answers into a percentage score.

Estimate composite ACT score from section scores.

Estimate total SAT score from section scores.

Estimate basal metabolic rate (resting calories) using Mifflin-St Jeor.

Calculate BMI (body mass index) and category from height and weight.

Estimate 1RM from weight and reps using common formulas.

Estimate next period, ovulation, and fertile window from cycle length.

Estimate weekly study hours based on course load.

Estimate paycheck results after taxes and deductions.

Estimate net salary using a simple effective tax rate.

Convert hourly wage to yearly salary.

Convert yearly salary to hourly wage.

Calculate monthly payments for a fixed-rate loan.

Estimate mortgage payment with taxes and insurance.

Estimate investment growth with compounding.

Project retirement savings with contributions and returns.

Calculate maintenance, cut, and bulk calories fast.

Calculate daily calories for a deficit based on TDEE.

Estimate body fat percentage using measurements.

Estimate ideal weight range based on height.