--- title: "18 pt to gal = 2.25 gal" description: "18 US pints is 2.25 US gallons. The arithmetic, a table of nearby values, and a converter for any other number." url: https://atoneplace.net/convert/18-pints-to-gallons/ site: "At One Place" --- # 18 pt to gal **18 US pints in US gallons: 18 pt = 2.25 gal** gal = pt × 1/8 18 US pints is 2.25 US gallons. To get there, multiply by 0.125. ## Values either side *US pints near 18, converted to US gallons.* | US pints | US gallons | | --- | --- | | 14 pt | 1.75 | | 15 pt | 1.875 | | 16 pt | 2 | | 17 pt | 2.125 | | 18 pt ← | 2.25 | | 19 pt | 2.375 | | 20 pt | 2.5 | | 21 pt | 2.625 | | 22 pt | 2.75 | ## How the conversion works The relationship is gal = pt × 1/8. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two. > US gallon: US liquid gallon. The imperial gallon is about 20% larger. ## Common questions ### What is 18 pt in US gallons? 18 pt is 2.25 gal. ### How do you convert US pints to US gallons? Multiply by 0.125. ## Related pages - [US pints to US gallons](https://atoneplace.net/convert/pints-to-gallons/) - [18 gal to pt](https://atoneplace.net/convert/18-gallons-to-pints/) - [14 pt to gal](https://atoneplace.net/convert/14-pints-to-gallons/) - [15 pt to gal](https://atoneplace.net/convert/15-pints-to-gallons/) - [16 pt to gal](https://atoneplace.net/convert/16-pints-to-gallons/) - [17 pt to gal](https://atoneplace.net/convert/17-pints-to-gallons/) - [19 pt to gal](https://atoneplace.net/convert/19-pints-to-gallons/) - [20 pt to gal](https://atoneplace.net/convert/20-pints-to-gallons/) - [21 pt to gal](https://atoneplace.net/convert/21-pints-to-gallons/) - [22 pt to gal](https://atoneplace.net/convert/22-pints-to-gallons/) ## Sources - Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)] - The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure) - Calculated on this page — At One Place (/about/)