Conversion Calculator
1 m = 3.2808399 ft
- Category
- Length
- Input
- 1 m
- Result
- 3.280839895 ft
- Base value
- 1 m
What this calculator does
The Conversion Calculator changes a measurement from one unit to another within a selected category. It supports four everyday categories: length, weight or mass, volume, and temperature. Each category offers a focused list of common units rather than an exhaustive catalog, so the form stays readable and the result is easy to interpret.
Unit conversion matters when recipes, travel directions, labels, and plans use different systems. A distance may be given in miles but needed in kilometers, or a package weighed in pounds but shipped in kilograms.
How to use this calculator
- Choose a category: length, weight, volume, or temperature. The category selector also resets the unit lists to sensible defaults for that category.
- Select the unit you are converting from.
- Select the unit you are converting to.
- Enter the value and click Calculate.
The default length example converts 1 meter to about 3.28084 feet. Other defaults include 1 kilogram to about 2.20462 pounds, 1 liter to about 0.264172 US gallons, and 25 degrees Celsius to 77 degrees Fahrenheit. The Clear button restores the defaults for the current category.
Formulas
Length, weight, and volume units are converted through a common base unit. Each unit has a fixed factor that expresses how many base units it contains.
base value = input value × factor(from unit)
result = base value ÷ factor(to unit)
The base units used internally are the meter for length, the kilogram for weight, and the cubic meter for volume. Temperature uses offset formulas instead of simple multiplication:
°F = °C × 9/5 + 32
°C = (°F − 32) × 5/9
K = °C + 273.15
What the results mean
The result card shows the converted value, the original value, and the value in the category's base unit, which makes the calculation easier to audit. For temperature, the base value is degrees Celsius.
The calculator uses full-precision intermediate values and rounds only the displayed result. Very small or very large results may use scientific notation. Zero is accepted for length, weight, and volume. Temperatures below absolute zero are rejected.
Assumptions and limitations
- The weight category converts mass units such as kilograms, grams, ounces, and pounds. It does not calculate the force of gravity on an object; for that, use the Weight Calculator.
- The unit lists cover common units only. Specialized units such as fathoms, drams, slugs, and board feet are not included.
- Currency, time, area, speed, energy, pressure, and data-size conversions are outside the scope of this page.
- Temperature results are valid at or above absolute zero. The calculator does not model measurement uncertainty or sensor error.
- The US gallon, US quart, US pint, US cup, and US fluid ounce are not the same as their UK counterparts. The labels identify the US versions.
- Displayed values are rounded. For engineering, medical, or legal work, verify the result with a source that specifies the required precision and rounding rules.
Frequently asked questions
How many feet are in a meter?
One meter equals about 3.28084 feet. The exact value is 1 ÷ 0.3048, because the international foot is defined as exactly 0.3048 meters.
How many milliliters are in a US gallon?
One US gallon equals 3,785.411784 milliliters, or about 3.785 liters. A UK gallon is larger, at about 4.546 liters, which is why the calculator labels both units separately.
Why is 25 degrees Celsius equal to 77 degrees Fahrenheit?
The Fahrenheit scale has a different zero point and degree size. Applying °F = °C × 9/5 + 32 gives 25 × 1.8 + 32 = 77. Temperature conversions are affine, not simple ratios.
Why does the weight category say mass?
In everyday language, weight often means the amount of matter in an object. In physics, that quantity is mass, and the factors here describe mass units.
Common conversion factors
| From | To | Multiply by |
|---|---|---|
| 1 inch (in) | centimeters (cm) | 2.54 |
| 1 foot (ft) | centimeters (cm) | 30.48 |
| 1 yard (yd) | meters (m) | 0.9144 |
| 1 mile (mi) | kilometers (km) | 1.609344 |
| 1 nautical mile (nmi) | kilometers (km) | 1.852 |
| 1 meter (m) | feet (ft) | 3.280839895 |
| 1 kilometer (km) | miles (mi) | 0.621371192 |
| 1 pound (lb) | kilograms (kg) | 0.45359237 |
| 1 ounce (oz) | grams (g) | 28.349523125 |
| 1 kilogram (kg) | pounds (lb) | 2.204622622 |
| 1 US gallon (gal) | liters (L) | 3.785411784 |
| 1 liter (L) | US gallons (gal) | 0.264172052 |
| 1 US fluid ounce (fl oz) | milliliters (mL) | 29.573529563 |
| 1 UK gallon (gal) | liters (L) | 4.54609 |
Temperature is not a simple multiplication: °F = °C × 9/5 + 32, °C = (°F − 32) × 5/9, and K = °C + 273.15.
Source
Reference: Calculator.net — Conversion Calculator. Unit factors follow internationally defined relationships, including the exact international inch and the avoirdupois pound.
Disclaimer
This calculator provides general-purpose unit conversions. It is not a substitute for calibrated measurement, engineering standards, or professional advice where precise units and tolerances are critical.