Syrup to Water Ratio

Add the two numbers to count the parts, then divide the batch by that. Making 400 mL at 1:4 gives five parts — 80 mL syrup and 320 mL water.

Your numbers

Volume (mL)(mL)Syrup partsWater parts

Syrup (mL)

80mL

Water to add (mL)

320mL

Percentage

20%

Formula

Syrup (mL) = Volume (mL) × Syrup parts ÷ (Syrup parts + Water parts)

1:4 means one part syrup to four of water, not one part in four. Confusing the two is a 25% error in strength.

What to enter

Input	Default	Accepted range
Volume (mL) (mL)Volume in millilitres.	400	0 and up
Syrup partsHow many parts of the ratio are syrup.	1	0 and up
Water partsHow many parts of the ratio are water.	4	0 and up

Step by step

FormulaSyrup (mL) = Volume (mL) × Syrup parts ÷ (Syrup parts + Water parts)

With the default numbersSyrup (mL) = 400 × 1 ÷ (1 + 4)

AnswerSyrup (mL) = 80 mL

Quick reference table

Results when only Volume (mL) (mL) changes and everything else stays put.

Volume (mL) (mL)	Syrup (mL) (mL)	Water to add (mL) (mL)	Percentage (%)
200	40	160	20
300	60	240	20
400	80	320	20
600	120	480	20
800	160	640	20

What each result means

Result	At default values
Syrup (mL) (mL)The amount of syrup to actually pour.	80
Water to add (mL) (mL)How much water to pour in to hit the target.	320
Percentage (%)A share expressed out of 100.	20

Common mistakes

1:4 means one part syrup to four of water, not one part in four. Confusing the two is a 25% error in strength.

Glossary

Volume (mL): Volume in millilitres.
Syrup parts: How many parts of the ratio are syrup.
Water parts: How many parts of the ratio are water.
Syrup (mL): The amount of syrup to actually pour.
Water to add (mL): How much water to pour in to hit the target.
Percentage: A share expressed out of 100.

Frequently asked questions

QHow is Syrup to Water Ratio calculated?

Syrup (mL) = Volume (mL) × Syrup parts ÷ (Syrup parts + Water parts) — Add the two numbers to count the parts, then divide the batch by that. Making 400 mL at 1:4 gives five parts — 80 mL syrup and 320 mL water.

QCan you walk through an example?

With Volume (mL) 400mL, Syrup parts 1, Water parts 4, the answer is Syrup (mL) 80mL.

QWhat do I need to enter?

Enter Volume (mL), Syrup parts, Water parts. The result recalculates as you type, and an empty box counts as zero.

QHow much does the answer move if I change a number?

Changing only Volume (mL) (mL) moves the answer to Volume (mL) (mL) 200 → Syrup (mL) (mL) 40 and Volume (mL) (mL) 800 → Syrup (mL) (mL) 160. The table below lays out five steps.

QHow are the numbers rounded?

Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.

QAnything to watch out for?

1:4 means one part syrup to four of water, not one part in four. Confusing the two is a 25% error in strength.

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