Universal Calculator
Unit Converter
Convert heights, lengths, and sizes instantly. Previously called our “calculator”.
How to Use This Converter
- Choose a converter type from the dropdown (e.g., Length/Distance, Weight/Mass).
- Enter a value in the first field.
- Pick the from and to units.
- 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
in | cm | in | cm |
---|---|---|---|
1 | 2.54 | 20 | 50.80 |
5 | 12.70 | 24 | 60.96 |
10 | 25.40 | 30 | 76.20 |
12 (1 ft) | 30.48 | 36 (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
kg | lb | kg | lb |
---|---|---|---|
1 | 2.205 | 10 | 22.046 |
2.5 | 5.512 | 20 | 44.092 |
5 | 11.023 | 50 | 110.231 |
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.