Mixing Ratio Calculator
The Mixing Ratio Calculator determines exact amounts of each component when combining materials at a specified ratio. Enter a mixing ratio like 3:1:1 and total volume to get precise measurements — perfect for paint mixing, epoxy, concrete, resin, and chemical solutions.
🕐 Recent Calculations
What is a Mixing Ratio?
A mixing ratio specifies the proportional amounts of each component in a mixture. A 3:1 epoxy ratio means 3 parts resin to 1 part hardener by volume or weight. Accurate mixing ratios are critical — incorrect proportions can cause epoxy that never cures, paint that won't dry, or concrete that crumbles.
Mixing ratios appear in automotive paint (4:1:1 base:reducer:hardener), construction (1:2:3 cement:sand:gravel), bartending (2:1 spirit:mixer), and chemical manufacturing. Some ratios are by volume and others by weight — always check which unit the ratio references.
Formules et Équations utilisées
Ce calculateur s'appuie sur 5 équations fondamentales :
1 Component Amount ▼
For 3:1 ratio and 1 gallon total: Part A = 1 gal × (3/4) = 0.75 gal; Part B = 1 gal × (1/4) = 0.25 gal.
2 Total from Component ▼
If Part A is 600ml and ratio is 3:1: Total = 600 × (4/3) = 800ml.
3 Three-Part Mix ▼
For 4:1:1 and 3 liters: Part A = 3 × (4/6) = 2L; Parts B&C = 0.5L each.
Comment utiliser ce calculateur
Pour utiliser ce Calculateur de Ratio, suivez ces 3 étapes :
Saisir les Valeurs
Saisissez les valeurs de ratio connues dans les champs. Laissez un champ vide — c'est la valeur manquante que le calculateur va chercher à résoudre.
Choisir le Mode
Sélectionnez le mode de ratio — Résoudre, Simplifier ou Mettre à l'échelle. Chaque mode applique des formules différentes à vos valeurs.
Obtenir les Résultats
Cliquez sur Calculer. L'écran de résultats affiche la réponse avec une barre de ratio interactive, un diagramme circulaire et le détail des calculs.
Exemples Pratiques et Solutions Étape par Étape
Voici 3 exemples de calculs résolus avec les étapes détaillées grâce à ce calculateur :
Saisie 1 Mix 2-part epoxy at 3:1 ratio for 500ml total
Saisie 2 Automotive paint: 4:1:1 ratio, need 800ml
Saisie 3 Mortar mix: 1:3 cement to sand, 50 kg cement available
Foire Aux Questions
How do I calculate a mixing ratio? ▼
Divide each component amount by the smallest amount. If you mix 750ml of A with 250ml of B: divide both by 250 to get 3:1. This simplification gives you the ratio in its simplest form.
Is mixing ratio by weight or volume? ▼
It depends on the product. Epoxy and paint ratios are usually by volume. Concrete and food ratios may be by weight. Always check the product label — mixing by the wrong unit can cause failures.
What happens if I mix epoxy at the wrong ratio? ▼
Incorrect ratios cause incomplete curing. Too much resin leaves a sticky, soft surface. Too much hardener creates a brittle, yellowed result. Most epoxies have very little tolerance — stay within 5% of the specified ratio.
How do I convert a mixing ratio to percentage? ▼
Divide each part by the total. A 3:1 ratio = 3/4 = 75% Part A and 1/4 = 25% Part B. A 5:3:2 ratio = 50% + 30% + 20%.
Can I scale a mixing ratio up or down? ▼
Yes. Multiply all parts by the same factor. If 3:1 uses 300ml + 100ml, doubling gives 600ml + 200ml. The ratio stays 3:1 regardless of total volume.