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4 Free Calculators

Math & Utility Calculators

Everyday calculations made simple. Convert metric to imperial, calculate percentages, split tips, and convert time zones. 4 free utility calculators.

Length Converter

mm, cm, m, km ↔ inches, feet, yards, miles.

Weight Converter

kg, g ↔ pounds, ounces, stone, metric ton.

Temperature Converter

Celsius ↔ Fahrenheit ↔ Kelvin.

Volume Converter

Liters, ml ↔ gallons, fl oz, cups, pints, quarts.

Speed Converter

km/h ↔ mph, m/s, knots, fps.

m², hectares ↔ acres, sq ft, sq mi.

All-in-One Unit Converter

All 6 conversion types in one tabbed tool.

Time Zone Calculator

Convert times between 40+ time zones with live world clock and meeting planner.

Percentage Calculator

Three modes: find X% of Y, what percent X is of Y, and percentage change.

Tip amount, total bill, and per-person split with rounding options.

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