Universal Calculator

⟷
Enter a value and click Convert

Unit Converter

Convert heights, lengths, and sizes instantly. Previously called our “calculator”.

How to Use This Converter

  1. Choose a converter type from the dropdown (e.g., Length/Distance, Weight/Mass).
  2. Enter a value in the first field.
  3. Pick the from and to units.
  4. Click Convert to see the result instantly; use Clear to reset.

Tip: On mobile, tap directly into the input box to use the numeric keyboard.

Supported Converter Types (with formulas & quick examples)

Length & Distance Converter

Convert between meters (m), centimeters (cm), millimeters (mm), inches (in), feet (ft), and yards (yd).

Key factors

  • 1 in = 2.54 cm
  • 1 ft = 12 in = 0.3048 m
  • 1 yd = 3 ft = 0.9144 m
  • 1 m = 100 cm = 39.3701 in

Examples

  • 180 cm → 70.87 in → 5 ft 10.87 in (≈ 5′11″)
  • 2.4 m → 7.87 ft (great for checking ceiling clearance)

Micro-table: Inches ↔ Centimeters

Inches to centimeters quick reference
incmincm
12.542050.80
512.702460.96
1025.403076.20
12 (1 ft)30.4836 (1 yd)91.44

Weight & Mass Converter

Switch easily between kilograms (kg), grams (g), pounds (lb), and ounces (oz).

Key factors

  • 1 kg = 2.20462262 lb
  • 1 lb = 16 oz = 0.45359237 kg
  • 1 oz = 28.349523125 g

Examples

  • 70 kg → 154.324 lb (fitness & BMI checks)
  • 5 lb → 2.26796 kg (useful for luggage limits)

Micro-table: Kilograms ↔ Pounds

Kilograms to pounds quick reference
kglbkglb
12.2051022.046
2.55.5122044.092
511.02350110.231

Temperature Converter

Convert Celsius (°C), Fahrenheit (°F), and Kelvin (K).

Formulas

°F
= (°C × 9/5) + 32
°C
= (°F − 32) × 5/9
K
= °C + 273.15

Examples

  • 0 °C → 32 °F (freezing point of water)
  • 100 °F → 37.78 °C (warm day)

Area Converter

Convert square meter (m²), square centimeter (cm²), square inch (in²), square foot (ft²), square yard (yd²), acre, and hectare.

Key factors

  • 1 m² = 10.7639 ft²
  • 1 ft² = 144 in²
  • 1 acre = 4,046.8564224 m² = 43,560 ft²
  • 1 hectare = 10,000 m² = 2.47105 acres

Example

12 ft × 10 ft room = 120 ft² = 11.148 m²

Volume Converter

Convert liter (L), milliliter (mL), cubic meter (m³), gallon (US), quart (US), pint (US), cup (US), fluid ounce (US).

Key factors (US)

  • 1 L = 33.814 fl oz = 2.113 pints = 1.057 quarts = 0.264172 gallons
  • 1 gallon (US) = 3.78541 L
  • 1 cup (US) = 236.588 mL

Example

2 L water bottle → 67.63 fl oz (about 8.45 cups)

Angle Converter

Convert degrees (°), radians (rad), and gradians (gon).

Formulas

rad
= ° × π / 180
°
= rad × 180 / π
gon
= ° × 10 / 9

Example

90° → π/2 rad ≈ 1.5708 rad

Speed Converter

Convert kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), and knots (kt).

Key factors

  • 1 m/s = 3.6 km/h
  • 1 mph = 1.60934 km/h
  • 1 kt = 1.852 km/h

Example

10 m/s → 22.37 mph (sprint speed)

Time Converter

Convert seconds, minutes, hours, and days.

Key factors

  • 1 min = 60 s
  • 1 hr = 60 min = 3,600 s
  • 1 day = 24 hr = 86,400 s

Example

2.5 hr → 150 minutes

Why Use This Converter?

  • Fast & precise: Trusted conversion formulas with sensible rounding.
  • All-in-one: Switch categories in one place—no multiple apps.
  • Mobile-friendly: Designed for quick entry and instant results on any device.
  • Free forever: No sign-up, no paywall.
  • Great for height & size: Body measurements, clothing & shoe sizes, furniture fit, TV/desk ergonomics, and travel conversions.

Examples & Use Cases

Clothing & Body Measurements

Convert cm ↔ in to compare international size charts.

Example: 92 cm chest ≈ 36.22 in → often a US Men’s Small/Medium (depending on brand).

Home & Furniture

Check if a 79 in sofa fits a 2.4 m wall: 2.4 m = 94.49 in, so you’ll have ~15.5 in clearance.

Travel & Fitness

Luggage limit 23 kg = 50.71 lb—pack accordingly.

Jogging pace 10 km/h = 6.21 mph.

Tips for Accurate Conversions

  • Mind rounding: For clothing or cutting materials, round up to practical fractions (⅛, ¼, ½ inch).
  • Use context: Liquid measures differ (US vs UK gallons). This tool uses US customary by default when “gallon/cup” is selected.
  • Check decimals: For scientific or carpentry work, increase decimal places if your workflow needs precision.
  • Stay consistent: Don’t mix units within the same project (e.g., cm and inches on one drawing).

FAQs

How accurate is this converter?

We use internationally recognized conversion constants (e.g., 1 inch = 2.54 cm exactly; 1 lb = 0.45359237 kg exactly). Outputs are precise; rounding is applied only for presentation.

Can I use it on my phone?

Yes. The converter is responsive and uses mobile-friendly inputs for fast entry on touch devices.

Do you support US and metric units?

Absolutely. Choose metric (m, cm, kg, °C) or US/customary (in, ft, lb, °F, cups, gallons).

What about UK vs US volume units?

When you select “gallon,” “quart,” “pint,” or “cup,” we use US measures. For UK/Imperial, use liters as a bridge (e.g., 1 UK gallon = 4.54609 L).

Can I copy or share results?

Yes—highlight the result and copy.