Volume measures three-dimensional space. The SI unit is the cubic meter (m³), but daily life uses liters, milliliters, gallons, cups, and spoons. Cooking, fuel, beverages, plumbing, and shipping each lean on a different set of units, so cross-conversions are constant.
Common Conversion Formulas
US gallon → liter: multiply by 3.78541
liter → US gallon: multiply by 0.264172
UK gallon → liter: multiply by 4.54609
cubic foot → liter: multiply by 28.3168
cubic meter → liter: multiply by 1,000
fluid ounce (US) → mL: multiply by 29.5735
cup (US) → mL: multiply by 236.588
tablespoon (US) → mL: multiply by 14.7868
Cooking Reference Table
Measure
mL
fl oz (US)
1 teaspoon
4.93
0.17
1 tablespoon
14.79
0.5
1/4 cup
59.15
2
1/2 cup
118.29
4
1 cup
236.59
8
1 pint
473.18
16
1 quart
946.35
32
1 gallon (US)
3,785.41
128
Common Use Cases
Cooking & baking: Convert recipes between cups, mL, and tablespoons across regions.
Fuel economy: Compare US mpg, UK mpg, and L/100 km — they use different gallons.
Plumbing & tanks: Convert tank capacity between cubic feet, gallons, and liters.
Beverages: Bottle sizes, can sizes, and serving sizes in oz, mL, or pints.
Shipping: Cargo volume in cubic meters or cubic feet.
Medical: Liquid medication dosing in mL and teaspoons.
Volume Converter is a free browser tool from SimpleCounter. Free volume converter. Convert liters, gallons, milliliters, cups, cubic feet, fluid ounces, tablespoons and teaspoons instantly. Enter your values and the result updates as you type — there is nothing to install and no account to create.
Definition: Volume Converter
A volume converter takes the numbers you enter and returns the result using the standard formula for that calculation, so you do not have to work it out by hand.
Key facts
Key facts about Volume Converter
Cost
Free, with no account and no usage limit.
Where the maths happens
In your browser. The values you type are not sent to a server.
Devices
Any modern browser on phone, tablet, laptop or desktop.
Accuracy
Standard published formulas, shown with the units you selected.
Intended use
Estimates for everyday and educational use, not professional advice.
How to use the volume converter
Type your value into the first field.
Choose the unit or option that matches your figures, if the tool offers a choice.
Read the result — it recalculates immediately, with no submit button.
Change any input to compare a second scenario side by side.
Disclaimer: This tool is provided for educational and informational purposes only. Results are estimates based on standard formulas and the inputs you provide. For financial, medical, legal, or tax decisions, consult a qualified professional. See our full disclaimer.
Frequently Asked Questions
How many liters are in a gallon?
1 US gallon = 3.78541 liters. 1 UK (imperial) gallon = 4.54609 liters. The two are not interchangeable — recipes and fuel-economy figures matter.
How many cups are in a liter?
1 liter ≈ 4.227 US cups (1 US cup = 236.588 mL). UK metric cups are 250 mL, so 1 L = 4 UK metric cups.
How many mL in a teaspoon?
1 US teaspoon = 4.929 mL (usually rounded to 5 mL). 1 US tablespoon = 14.787 mL (rounded to 15 mL). UK teaspoon is ≈ 5.92 mL.
How do you convert cubic feet to gallons?
Multiply ft³ by 7.4805 for US gallons, or by 6.2288 for UK gallons. Example: a 10 ft³ tank holds about 74.8 US gallons.
How many fluid ounces in a cup?
1 US cup = 8 US fluid ounces = 236.6 mL. A pint is 16 fl oz, a quart is 32 fl oz, and a gallon is 128 fl oz.
Why are US and UK gallons different?
The US gallon (3.785 L) is based on the historical wine gallon; the UK imperial gallon (4.546 L) was standardized in 1824. The UK gallon is about 20% larger.
How do I convert volume for a recipe?
For small amounts use mL/teaspoon/tablespoon. For larger amounts use cups or liters. Be careful with dry vs liquid ingredients — a cup of flour by weight differs from a cup of water.
Benefits of using the Volume Converter
What you actually get compared with a mechanical clicker, a notes app, or trying to hold the number in your head.
Nothing to install, nothing to sign up for
Open the volume converter and start counting in the same second. No account, no email, no trial.
Your count survives real life
Totals are saved on your device as you go, so a locked screen, a closed tab, or a lost signal does not reset anything.
Works offline once loaded
Install it to your home screen and it keeps working in a warehouse, a pool hall, a field, or a plane — no connection needed.
Private by default
Counts stay in your browser. There is no cloud sync, no profile, and nothing about what you count is sent to us.
Free, with no sign-up
Works offline once loaded
Counts stay on your device
Installable as an app
Runs in your browser — nothing to download
72+ counter types available
Share your setup
We publish only real, attributed feedback here — so this space is intentionally empty until we have your words to put in it. Tell us what you use the volume converter for and we will add your story, with your name, to this page.