๐งฎ Everyday Calculators
BMI, ratios, percentages and the other formulas you use often but never quite remember.
015 tools
BMI Calculator
Free BMI calculator in lb and ft/in or kg and cm. See your WHO/CDC weight category, healthy weight range for your height, Asian cutoffs and waist-size risk.
โRatio Calculator
Solve proportions (A:B = C:?), simplify ratios by the GCD, split money by a ratio like 60:40, and find screen aspect ratios such as 16:9 โ free ratio calculator.
โGPA Calculator
Free GPA calculator: enter credits and letter grades to get your unweighted and weighted GPA on a 4.0 scale, plus 4.3/4.5 scale and percent conversions.
โGas Cost & MPG Calculator
Calculate gas cost for a trip or monthly commute from miles, MPG and price per gallon, and find your real MPG from a fill-up. Metric km/L and L/100 km too.
โScientific Calculator
Free online scientific calculator with sin, cos, tan and inverses (DEG/RAD), ln, log, log2, roots, powers, factorials, memory, history and keyboard input.
โEveryday formulas
The BMI calculator gives your body mass index and weight category; the ratio calculator solves A:B = C:? for recipes, screen sizes or splitting shares; the percentage calculator answers "what is X% of Y" and "how much did it change".
Limits of BMI
BMI does not distinguish muscle from fat, so athletes, teens and older adults should also look at waist size and body composition.