Calculator Base

A calmer way to figure it out.

Practical calculators for money, health, time, and everything in between. Accurate enough to trust. Simple enough to use mid-decision.

Calculator library

Browse 27 browser-based calculators. Results are estimates for general informational use.

Math

Basic Calculator — Everyday arithmetic, without the clutter.
Percentage — Find a percentage, change, or difference.
Fraction — Add, subtract, multiply, and divide fractions.
Scientific — Powers, roots, logs, and trigonometry at a glance.

Finance

Tip — A fair tip, split cleanly for the table.
Split Bill — Settle up evenly, including a tip.
Discount — See the sale price and exactly what you save.
Simple Interest — Estimate interest on a straightforward loan.
Compound Interest — See how money grows over time.
Loan Payment — A quick monthly payment estimate.
Mortgage — Plan a home payment before you make an offer.

Health

BMI — A screening estimate based on height and weight.
Calorie Needs — A starting estimate for daily energy needs.

Dates & time

Age — Your exact age in years, months, and days.
Date Difference — Count the days between two dates.
Time Duration — Find the elapsed time between two clocks.
Hours & Minutes — Convert and add time without mental math.

Conversions

Length Converter — Move between inches, feet, yards, miles, and metric lengths.
Weight Converter — Convert pounds, ounces, tons, kilograms, and more.
Temperature Converter — Convert Fahrenheit, Celsius, and Kelvin.
Area Converter — Compare square feet, acres, and metric areas.
Volume Converter — Convert gallons, quarts, cups, fluid ounces, and liters.
Speed Converter — Translate miles per hour to kilometers per hour.
Data Storage Converter — Bits, bytes, and binary storage units.

Lifestyle

Pace — Turn a finish time into a useful running pace.
Fuel Cost — Budget a drive by distance and efficiency.
GPA — A weighted grade point average in seconds.

Important limitations

Results are estimates, not professional advice or guarantees. Financial tools may omit taxes and fees; health tools are screening estimates, not diagnoses; and conversions may be rounded. Verify important decisions with a qualified professional or authoritative source.