Convert Tun to US Gallon
Convert tuns to us gallons instantly. 1 tun = 252 us gallon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Gallon to Tun converter for the reverse conversion.
Units explained
Tun
A tun is 252 US gallons (953.92 L), the largest traditional liquid cask.
From Old English/French for a large barrel; the basis of 'tonnage'.
Historical for wine and the origin of ship tonnage.
Medieval cask system.
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Tun to US Gallon conversion formula
The relationship between tuns and us gallons:
To convert tuns to us gallons, multiply the value in tuns by 252. To reverse, multiply us gallons by 0.003968254.
How to use this converter
Type a value into the calculator. The result in us gallons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Gallon to Tun converter for the reverse direction.
Step-by-step: convert tuns to us gallons
- Write down the value in tuns (tun).
- Multiply that value by the factor 252.
- The product is the equivalent value in us gallons (gal).
- To reverse, multiply the us gallon value by 0.003968254.
Worked examples
Example 1 — Convert 1 tun to gal:
1 × 252 = 252 gal
Example 2 — Convert 100 tun to gal:
100 × 252 = 25200 gal
Real-world example — Fabric and tailoring
One tun of fabric converts to a value in us gallons commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 tun × 252 = 252 gal
Real-world example — Body height conversion (reverse direction)
You measure 1.75 tuns tall and need to fill in a gym membership form or medical record that asks for height in us gallons. This is the most-used everyday length conversion in metric-using countries.
1.75 tun × 252 = 441 gal
Real-world example — Pet and accessory dimensions
A 3-tun dog leash equals a tidy round value in us gallons. Pet-supply shopping frequently mixes the two units across product specifications.
3 tun × 252 = 756 gal
Tun to US Gallon conversion table
Standard reference values for converting tuns to us gallons:
| Tun [tun] | US Gallon [gal] |
|---|---|
| 0.01 | 2.52 |
| 0.1 | 25.2 |
| 1 | 252 |
| 2 | 504 |
| 3 | 756 |
| 4 | 1008 |
| 5 | 1260 |
| 10 | 2520 |
| 20 | 5040 |
| 30 | 7560 |
| 40 | 10080 |
| 50 | 12600 |
| 100 | 25200 |
| 500 | 126000 |
| 1000 | 252000 |
Frequently asked questions
How many us gallons is 1 tun?
How do I convert tuns to us gallons?
How do I convert us gallons back to tuns?
How many us gallons is 100 tuns?
Popular volume unit conversions
Convert Tun to other volume units
Show all Tun conversions
Metric / SI (3 units)
US Customary (Liquid) (1 units)
Imperial (UK) (1 units)
Cubic (length-derived) (1 units)
Sources & references
Conversion factor (1 tun = 252 gal) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.