8 pages, grouped by section. Each one shows its formula and sources.
Calculate compound interest from a starting balance, regular contributions and any compounding frequency. See year-by-year growth and total interest earned.
Project your 401(k) balance at retirement from your salary, contribution rate and employer match. Includes 2026 IRS limits and catch-up contributions.
Calculate your monthly mortgage payment including property tax, insurance, PMI and HOA fees. Full amortization schedule and total interest over the loan.
Calculate your body mass index in metric or imperial units. See your WHO weight category and the healthy weight range for your height.
Calculate the volume of a box, cylinder, sphere, cone, pyramid or capsule from its dimensions. Results in cubic units, litres and US gallons.
Simplify a ratio to its lowest terms, solve a proportion for a missing value, or scale a ratio up and down. Shows the working at every step.
Calculate mean, median, mode, range, variance, standard deviation and quartiles from any data set. Paste your numbers and see every step of the working.
Calculate what is X% of Y, what percent one number is of another, percentage increase or decrease, and reverse percentages. Shows the working each time.
Find out what score you need on your final exam to reach the grade you want. Enter your current grade and the exam weight to see the required mark.
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