Calculators

Compute age in years, months, and days from a birth date so forms and milestones stay accurate.

161k uses

Split a restaurant bill with a tip percentage so everyone knows what to pay before the card comes.

174k uses

Find sale prices and savings from a percent off so checkout math is clear before you buy anything.

140k uses

Convert length, weight, temperature, and similar units so specs and recipes stay consistent.

155k uses

Estimate body mass index from height and weight as a simple screening number, not a diagnosis.

129k uses

Solve percent of, percent change, and reverse percentages for grades, markups, and reports.

182k uses

Count days, weeks, and months between two dates for contracts, travel plans, and study schedules.

117k uses

Estimate installment amounts from principal, rate, and term so offers are easier to compare.

133k uses

Add or remove VAT from a net or gross amount so invoices and quotes stay internally consistent.

122k uses

Project how a balance grows with compound interest so savings scenarios are easier to compare.

98k uses

Divide a shared bill across people with optional extras so group payments are less awkward.

108k uses

Add time ranges or find the duration between clocks so timesheets and shifts add up correctly.

113k uses

Average course grades with credit weights so semester GPA estimates are easier to check at home.

76k uses

Estimate trip fuel spend from distance, efficiency, and price so road budgets are less surprising.

64k uses