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Universal Calculator

⟷
Enter a value and click Convert
Unit Converter – Fast, Accurate Height & Size Conversions

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

Common Conversion Factors (Quick Reference)

  • Length: 1 ft = 0.3048 m · 1 in = 2.54 cm · 1 yd = 0.9144 m
  • Weight: 1 lb = 0.45359237 kg · 1 oz = 28.3495 g
  • Temperature: °F = (°C × 9/5) + 32 · °C = (°F − 32) × 5/9
  • Area: 1 m² = 10.7639 ft² · 1 acre = 4,046.8564 m²
  • Volume: 1 L = 33.814 fl oz (US) · 1 gal (US) = 3.78541 L
  • Speed: 1 mph = 1.60934 km/h · 1 kt = 1.852 km/h
  • Angle: 1 rad = 57.2958°
  • Time: 1 day = 24 hours

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.

About This Converter

This converter is part of Height & Size, a site focused on practical measurement, sizing, and fit. We built it to make everyday decisions easier—from buying clothes and shoes to arranging furniture and checking fitness metrics.

If you spot an error or want a new unit, contact us and we’ll consider it for the next update.

This page may also help users searching for a height and size calculator.

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