Fluid Volume and Flow Conversion Chart
Quick-reference fluid volume and flow conversion chart. The tables below compare the most common units side by side. Download the free PDF for offline and printable use.
Standards and method
Values are calculated from the shared conversion-factor library. Exact defined relationships are preserved; displayed results are rounded only for readability.
Maintained by Miguel Coelho. Updated . See our editorial policy.
Printable fluid volume and flow conversion chart
US and UK liquid measures, fluid ounces and flow rates. Includes the exact definition, formulas, a worked example and sources. Conversion values are checked against the defining constants, and reference data is cited to its source, before the PDF is published.
Free to print, share and use in teaching materials with attribution (CC BY 4.0).
Also in the Pipe and Plant Engineering Reference Pack, with related sheets in one PDF.
Fluid Volume and Flow Conversion Table
Liquid volume
| Unit | per 1 mL |
|---|---|
| Milliliter (mL) | 1 mL |
| Liter (L) | 0.001 L |
| Fluid Ounce (US) (fl oz) | 0.033814 fl oz |
| Fluid Ounce (UK) (fl oz UK) | 0.0351951 fl oz UK |
| Cup (US) (cup) | 0.00422675 cup |
| Pint (US) (pt) | 0.00211338 pt |
| Pint (UK) (pt UK) | 0.00175975 pt UK |
| Quart (US) (qt) | 0.00105669 qt |
| Gallon (US) (gal) | 0.000264172 gal |
| Gallon (UK) (gal UK) | 0.000219969 gal UK |
Flow rate
| Unit | per 1 L/min |
|---|---|
| Liter per Minute (L/min) | 1 L/min |
| Liter per Second (L/s) | 0.0166667 L/s |
| Cubic Meter per Hour (m³/h) | 0.06 m³/h |
| Gallon per Minute (gpm) | 0.264172 gpm |
| Gallon (UK) per Minute (gal UK/min) | 0.219969 gal UK/min |
| Cubic Foot per Minute (CFM) | 0.0353147 CFM |
Values are calculated from the shared conversion-factor library. Exact defined relationships are preserved; displayed results are rounded only for readability.
Full fluid volume and flow conversion chart
US and UK liquid measures, fluid ounces and flow rates. These are the same tables as the printable PDF. For: Cooks, plumbers, pool and irrigation installers, and engineers.
- Exact definition
- 1 US gal = 3.785 411 784 L; 1 UK gal = 4.546 09 L; 1 US fl oz = 1/128 US gal
- Formula
- mL = US fl oz × 29.5735; mL = UK fl oz × 28.4131
- Reverse
- L/min = US gpm × 3.785 41
- Worked example
- A 10 US gpm pump = 37.85 L/min = 2.27 m³/h
- Rounding
- Matrix values use 6 significant figures; tables are rounded as shown.
Conversion factor matrix
Read across: 1 unit in the left column equals the value shown in each column unit.
| 1 unit = | mL | L | US fl oz | US cup | US pt | US qt | US gal | UK gal |
|---|---|---|---|---|---|---|---|---|
| 1 mL | 1 | 0.001 | 0.033814 | 0.00422675 | 0.00211338 | 0.00105669 | 2.64172 × 10⁻⁴ | 2.19969 × 10⁻⁴ |
| 1 L | 1,000 | 1 | 33.814 | 4.22675 | 2.11338 | 1.05669 | 0.264172 | 0.219969 |
| 1 US fl oz | 29.5735 | 0.0295735 | 1 | 0.125 | 0.0625 | 0.03125 | 0.0078125 | 0.00650527 |
| 1 US cup | 236.588 | 0.236588 | 8 | 1 | 0.5 | 0.25 | 0.0625 | 0.0520421 |
| 1 US pt | 473.176 | 0.473176 | 16 | 2 | 1 | 0.5 | 0.125 | 0.104084 |
| 1 US qt | 946.353 | 0.946353 | 32 | 4 | 2 | 1 | 0.25 | 0.208169 |
| 1 US gal | 3,785.41 | 3.78541 | 128 | 16 | 8 | 4 | 1 | 0.832674 |
| 1 UK gal | 4,546.09 | 4.54609 | 153.722 | 19.2152 | 9.6076 | 4.8038 | 1.20095 | 1 |
Fluid ounces to millilitres (US and UK)
| Fluid ounces | mL (US fl oz) | mL (UK fl oz) |
|---|---|---|
| 1 | 29.6 | 28.4 |
| 2 | 59.1 | 56.8 |
| 3 | 88.7 | 85.2 |
| 4 | 118.3 | 113.7 |
| 5 | 147.9 | 142.1 |
| 6 | 177.4 | 170.5 |
| 7 | 207.0 | 198.9 |
| 8 | 236.6 | 227.3 |
| 9 | 266.2 | 255.7 |
| 10 | 295.7 | 284.1 |
| 11 | 325.3 | 312.5 |
| 12 | 354.9 | 341.0 |
| 13 | 384.5 | 369.4 |
| 14 | 414.0 | 397.8 |
| 15 | 443.6 | 426.2 |
| 16 | 473.2 | 454.6 |
| Fluid ounces | mL (US fl oz) | mL (UK fl oz) |
|---|---|---|
| 17 | 502.8 | 483.0 |
| 18 | 532.3 | 511.4 |
| 19 | 561.9 | 539.8 |
| 20 | 591.5 | 568.3 |
| 21 | 621.0 | 596.7 |
| 22 | 650.6 | 625.1 |
| 23 | 680.2 | 653.5 |
| 24 | 709.8 | 681.9 |
| 25 | 739.3 | 710.3 |
| 26 | 768.9 | 738.7 |
| 27 | 798.5 | 767.2 |
| 28 | 828.1 | 795.6 |
| 29 | 857.6 | 824.0 |
| 30 | 887.2 | 852.4 |
| 31 | 916.8 | 880.8 |
| 32 | 946.4 | 909.2 |
Flow: litres per minute to gallons per minute and m³/h
| Litres per minute (L/min) | US gallons per minute (US gpm) | UK gallons per minute (UK gpm) | Cubic metres per hour (m³/h) |
|---|---|---|---|
| 1 | 0.26 | 0.22 | 0.06 |
| 2 | 0.53 | 0.44 | 0.12 |
| 5 | 1.32 | 1.10 | 0.30 |
| 10 | 2.64 | 2.20 | 0.60 |
| 15 | 3.96 | 3.30 | 0.90 |
| 20 | 5.28 | 4.40 | 1.20 |
| 25 | 6.60 | 5.50 | 1.50 |
| 30 | 7.93 | 6.60 | 1.80 |
| 40 | 10.57 | 8.80 | 2.40 |
| 50 | 13.21 | 11.00 | 3.00 |
| Litres per minute (L/min) | US gallons per minute (US gpm) | UK gallons per minute (UK gpm) | Cubic metres per hour (m³/h) |
|---|---|---|---|
| 60 | 15.85 | 13.20 | 3.60 |
| 75 | 19.81 | 16.50 | 4.50 |
| 100 | 26.42 | 22.00 | 6.00 |
| 150 | 39.63 | 33.00 | 9.00 |
| 200 | 52.83 | 43.99 | 12.00 |
| 250 | 66.04 | 54.99 | 15.00 |
| 300 | 79.25 | 65.99 | 18.00 |
| 400 | 105.67 | 87.99 | 24.00 |
| 500 | 132.09 | 109.98 | 30.00 |
| 1,000 | 264.17 | 219.97 | 60.00 |
US and UK measures compared
| From | To | Multiply by |
|---|---|---|
| US fluid ounces (US fl oz) | UK fluid ounces (UK fl oz) | 1.040843 |
| US pints (US pt) | UK pints (UK pt) | 0.8326742 |
| US gallons (US gal) | UK gallons (UK gal) | 0.8326742 |
| Cubic feet (ft³) | Litres (L) | 28.31685 |
| Cubic inches (in³) | Cubic centimetres (cm³) | 16.38706 |
| Cubic feet per minute (CFM) | Cubic metres per hour (m³/h) | 1.699011 |
Sources for this chart
Conversion values on this sheet are generated by the AllUnitConversions conversion library and automatically checked against the exact definitions above before the PDF is produced; reference tables are taken from the sources listed.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Related Converters & Charts
Fluid Volume and Flow Conversion Chart FAQs
Common questions about the fluid volume and flow conversion chart.
What does this fluid volume and flow conversion chart include?
It lists the most common fluid volume and flow units side by side with their conversion factors, plus a free printable PDF you can download for offline reference.
What exact definition is this fluid volume and flow chart based on?
1 US gal = 3.785 411 784 L; 1 UK gal = 4.546 09 L; 1 US fl oz = 1/128 US gal. Formula: mL = US fl oz × 29.5735; mL = UK fl oz × 28.4131. Matrix values use 6 significant figures; tables are rounded as shown.
Can I download this chart as a PDF, CSV, or JSON?
Yes. Use the Download A4 PDF or US Letter PDF buttons for a printable version, or download the same tables as CSV or JSON from the links on this page.