Microliter to Milliliter Converter

Quick answer: A microliter (µL) is one-millionth of a liter, the standard unit for pipetting in chemistry and biology labs. One milliliter equals 1,000 microliters, so divide microliters by 1,000 to get milliliters. This converter switches between microliters, milliliters, liters and nanoliters for dilutions, reagents and sample prep.

Last reviewed: September 2026

Value

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Key facts

1 mL = 1,000 µL; 1 µL = 0.001 mL — divide µL by 1,000 to get mL.
1 µL = 1 cubic millimetre (mm³); 1 mL = 1 cubic centimetre (cm³).
Micropipettes typically cover 0.1 µL to 10 mL across overlapping volume ranges.
"uL" is the plain-text spelling of µL — they mean exactly the same unit.

Pipetting 250 µL and need it in mL? This free microliter to milliliter converter (also spelled microlitre to millilitre) switches between µL, mL, liters and nanoliters instantly — built for chemistry and biology lab work like dilutions, reagent prep and sample volumes.

Enter a value, pick your units, and you get the answer plus a full table of equivalents. No sign-up, works on mobile and desktop.

How to use

Enter the value (e.g. 250).
Pick the from unit (µL) and the to unit (mL).
Read the answer and the full table of equivalents below the calculator.

How microliter conversion works

mL = µL ÷ 1,000 · µL = mL × 1,000

Term	Meaning
Microliter (µL)	10⁻⁶ L — one-millionth of a liter; the standard pipetting unit.
Milliliter (mL)	10⁻³ L — one-thousandth of a liter; equals 1 cm³ (1 cc).
Conversion factor	Exactly 1,000 µL per mL — a pure metric prefix shift.

Because both units are metric, converting is just moving the decimal point three places: 250 µL → 0.250 mL.

Worked examples

Pipetting a sample

250 µL → mL: 250 ÷ 1,000 = 0.25 mL.

100 µL → mL: 100 ÷ 1,000 = 0.1 mL — a tenth of a milliliter.

Preparing a reagent

2.5 mL → µL: 2.5 × 1,000 = 2,500 µL.

0.75 L → µL: 0.75 × 1,000,000 = 750,000 µL.

Lab volume units

Unit	Symbol	In liters	Typical lab use
Nanoliter	nL	10⁻⁹	Microfluidics, nanodispensing
Microliter	µL	10⁻⁶	Pipetting, PCR, ELISA
Milliliter	mL	10⁻³	Buffers, media, syringes
Cubic centimeter	cc	10⁻³	Same as mL; medical syringes
Liter	L	1	Stock solutions, large batches

Frequently asked questions

How many microliters are in 1 milliliter?

Exactly 1,000. Multiply milliliters by 1,000 to get microliters — so 2.5 mL is 2,500 µL.

How do you convert µL to mL?

Divide by 1,000. For example, 250 µL ÷ 1,000 = 0.25 mL. It is just a three-decimal-place shift because both are metric units.

What is a microliter used for in the lab?

Microliters are the standard unit for micropipettes: PCR reactions, ELISA assays, reagent aliquots and cell-culture media are all measured in µL.

Is µL the same as uL?

Yes. "uL" is the plain-text (ASCII) spelling of µL used when the Greek mu character is unavailable — for example in file names or old instruments.

How many mL is 100 microliters?

0.1 mL. And 1,000 µL is exactly 1 mL — a useful pipette calibration check.

Sources

NIST — Metric units and SI prefix definitions
BIPM — Defines the litre and SI prefixes

Key takeaways

1 mL = 1,000 µL; divide µL by 1,000 to get mL, multiply mL by 1,000 to get µL.
1 µL = 1 mm³; 1 mL = 1 cm³ = 1 cc.
µL and uL are the same unit — uL is just the ASCII spelling.

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