Free 100% In-Browser Tool

ml to Cups Converter: Convert Milliliters to Cups

Convert milliliters (ml) to US customary, metric, and UK cups with exact NIST mathematical factors.

Quick Answer:1 US customary cup equals exactly 236.5882365 ml. To convert ml to US cups, divide your milliliter volume by 236.5882365 (or multiply by 0.00422675). A metric cup is exactly 250 ml.

Initializing tool...

Privacy First: 100% Client-Side Processing

Processed in your browser. Files are never uploaded.

How to Use the ml to Cups Converter (Exact US & Metric Cups)

1Enter the volume in milliliters (ml) into the input field.
2Choose your preferred decimal display precision (from 2 up to 8 decimal places).
3View the converted US customary cup value alongside the step-by-step division formula.
4Check the reference table below for instant conversions to Metric (250 ml) and UK (284.13 ml) cups.

Formula & How It Works

Exact NIST Volume Conversion Formula

US Cups = Milliliters ÷ 236.5882365 | Metric Cups = Milliliters ÷ 250

Based on official NIST SP 811 definitions for United States Customary Units. Source: National Institute of Standards and Technology (NIST SP 811).

Worked Examples

Converting 250 ml to US Cups

Input: 250 ml

Explanation: 250 / 236.5882365 = 1.056688... US cups.

Result: 1.0567 US Cups (or 1.0000 Metric Cup)

Converting 500 ml (Half Liter) to Cups

Input: 500 ml

Explanation: 500 / 236.5882365 = 2.113376... US cups.

Result: 2.1134 US Cups (or 2.0000 Metric Cups)

Converting 100 ml to US Cups

Input: 100 ml

Explanation: 100 / 236.5882365 = 0.422675... US cups.

Result: 0.4227 US Cups

Frequently Asked Questions

How many ml are in 1 US cup?▼

There are exactly 236.5882365 milliliters in 1 US customary cup. In everyday cooking, this is often rounded to 237 ml or 240 ml.

What is the difference between a US cup and a metric cup?▼

A US customary cup is approximately 236.59 ml, while a metric cup (standard in Australia, New Zealand, and parts of the Commonwealth) is defined as exactly 250 ml.

How many cups is 500 ml?▼

500 ml equals approximately 2.11 US customary cups or exactly 2.0 metric cups.

How many cups is 250 ml?▼

250 ml is exactly 1 metric cup, or approximately 1.06 US customary cups.

Can I use this for measuring dry ingredients like flour?▼

This converter measures liquid volume. Because dry ingredients vary in density, dry cups should be weighed in grams using a kitchen scale for best accuracy.

What is an Imperial (UK) cup?▼

An Imperial cup is based on the British Imperial gallon and equals approximately 284.13 ml (half an Imperial pint).

Quick Reference & Conversion Table

Milliliters (ml)	US Customary Cups	Metric Cups (250 ml)	Imperial / UK Cups
50 ml	0.2113 cups	0.2000 cups	0.1759 cups
100 ml	0.4227 cups	0.4000 cups	0.3519 cups
150 ml	0.6340 cups	0.6000 cups	0.5279 cups
200 ml	0.8454 cups	0.8000 cups	0.7039 cups
236.59 ml	1.0000 cup	0.9464 cups	0.8327 cups
250 ml	1.0567 cups	1.0000 cup	0.8799 cups
500 ml	2.1134 cups	2.0000 cups	1.7598 cups
1,000 ml	4.2268 cups	4.0000 cups	3.5195 cups

⚠️ Common Pitfalls to Avoid

•Confusing the US customary cup (236.588 ml) with the metric cup (250 ml used in Australia and New Zealand).
•Using rough kitchen approximations like 240 ml for precise chemistry or delicate patisserie baking.
•Confusing fluid volume cups with dry weight ounce measurements.

💡 Practical Real-World Uses

•Converting European and Asian metric cooking recipes to American measuring cups.
•Portioning liquid nutrition shakes, baby formula, and clinical hydration mixtures.
•Translating international culinary cookbooks and baking guides.

Last reviewed & updated: 2026-11-07

Free & Open Access

Related Utilities

Explore complementary calculators and converters with instant client-side execution