Quick Calculators
Percentage, discount, tip, inflation, mortgage — 9 instant everyday math tools. No sign-up, instant results.
Percentage
% of a number, change, proportion
X% × Y ÷ 100Discount
Final price after discount
price × (1 − d%)Tip
Gratuity & bill splitter
bill × tip%Simple Interest
Principal × Rate × Time
P × R × TInflation
Purchasing power over time
FV = PV × (1−i)nSavings Goal
Months to reach your target
monthly iterationCAGR
Annualized return rate
(end/start)1/y − 1Rule of 72
Years to double money
72 ÷ rateMortgage
Monthly payment estimator
P[r(1+r)n]÷[(1+r)n−1]Disclaimer: All calculators are for informational purposes only. Results are estimates. Verify important calculations independently.