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Dilution Ratio Calculator

The Dilution Ratio Calculator determines how much concentrate and water (or solvent) to mix for a desired dilution. Enter a ratio like 1:10 and total volume to get exact measurements — ideal for cleaning products, chemicals, fertilizers, and lab solutions.

Dilution Ratio Calculator — Live Preview
Mixing Amounts
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Proportion Solver
A : B = C : D — Enter any 3 values
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Results
Visual ratio breakdown
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Simplified
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    Ratio Simplifier
    Reduce any ratio to its simplest form
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    Simplified Result
    Reduced to lowest terms
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      Ratio Scaler
      Multiply a ratio by a scale factor
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      Scaled Result
      Ratio after scaling
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        🕐 Recent Calculations

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        What is a Dilution Ratio?

        A dilution ratio specifies how much concentrate to mix with a diluent (usually water). A 1:10 dilution ratio means 1 part concentrate to 10 parts water, creating 11 total parts. In chemistry, dilution follows the formula C₁V₁ = C₂V₂ to maintain the same amount of solute.

        Dilution ratios are critical in cleaning (1:32 for floor cleaner), agriculture (1:100 for pesticide spray), medical labs (serial dilutions for blood tests), photography (1:4 for developer solutions), and food service (concentrated syrups and juices).

        Formulas & Equations Used

        This Dilution Ratio Calculator uses the following core equations:

        1 Concentrate Amount ▼
        Concentrate = Total Volume / (Ratio Parts + 1)

        For 1:10 dilution of 1 liter total: Concentrate = 1000ml / (10+1) = 90.9 ml.

        2 Water Amount ▼
        Water = Total Volume - Concentrate

        For 1 liter at 1:10: Water = 1000 - 90.9 = 909.1 ml.

        3 Serial Dilution ▼
        Final Concentration = Initial × (1 / Dilution Factor)^Steps

        Starting at 1M with three 1:10 dilutions: Final = 1 × (1/10)³ = 0.001 M.

        How to Use This Dilution Ratio Calculator

        Follow these 3 simple steps:

        1

        Enter Your Values

        Type the known values into the input fields above. The Dilution Ratio Calculator accepts any positive numbers.

        2

        Choose Calculation Mode

        Select Solve, Simplify, or Scale mode in the calculator. Each applies different equations to your inputs.

        3

        View Results

        Click Calculate to see your answer with a visual ratio bar, pie chart, and step-by-step solution breakdown.

        Example Problems & Step-by-Step Solutions

        Here are 3 worked examples using this Dilution Ratio Calculator:

        Example 1 Mix 1:20 dilution of cleaner for 5 liters
        1 Total parts: 1 + 20 = 21
        2 Concentrate: 5000 ml / 21 = 238.1 ml
        3 Water: 5000 - 238.1 = 4761.9 ml
        ✓ Mix 238 ml concentrate with 4762 ml water
        Example 2 1:4 developer solution for 500ml total
        1 Total parts: 1 + 4 = 5
        2 Developer: 500 / 5 = 100 ml
        3 Water: 500 - 100 = 400 ml
        ✓ 100 ml developer + 400 ml water
        Example 3 Serial dilution: 3 steps of 1:10 from 0.5M
        1 Step 1: 0.5 × (1/10) = 0.05 M
        2 Step 2: 0.05 × (1/10) = 0.005 M
        3 Step 3: 0.005 × (1/10) = 0.0005 M
        ✓ Final concentration: 0.0005 M (5 × 10⁻⁴)

        Frequently Asked Questions

        What does a 1:10 dilution ratio mean? ▼

        A 1:10 ratio means 1 part concentrate mixed with 10 parts water, giving 11 total parts. To make 1 liter: use 90.9 ml concentrate and 909.1 ml water.

        How do I convert dilution ratio to percentage? ▼

        Divide 1 by the total parts and multiply by 100. A 1:20 dilution = 1/21 × 100 = 4.76% concentrate. A 1:4 dilution = 1/5 × 100 = 20% concentrate.

        What is the difference between 1:10 and 1/10 dilution? ▼

        In many contexts, 1:10 means 1 part to 10 parts (11 total). But in scientific notation, a 1/10 dilution means 1 part in 10 total parts. Always clarify whether the ratio is part:part or part:total.

        How do I dilute concentrated bleach for disinfecting? ▼

        The CDC recommends 1:48 (1 tablespoon per quart) for general disinfection with regular 5.25% bleach. For heavy contamination, use 1:10. Always check the bleach concentration label.

        What is a serial dilution? ▼

        A serial dilution performs multiple dilution steps sequentially. Each step dilutes by the same factor. Three 1:10 dilutions create a total 1:1000 dilution. This technique is used in microbiology to count bacteria and in medicine for antibody titers.

        Learn About Ratios

        What is a ratio?

        A ratio is a comparison between two or more quantities showing the relative size of one to another. Written as A : B, it means 'for every A units of the first quantity, there are B units of the second.' For example, a ratio of 3 : 4 means for every 3 parts of A, there are 4 parts of B. Ratios are used in cooking, construction, finance, science, and everyday life.

        How do I solve a proportion?

        A proportion is an equation that says two ratios are equal: A : B = C : D. To solve for a missing value, use cross-multiplication. If D is unknown: D = (B × C) / A. This works because in equal ratios, the cross products are always equal: A × D = B × C. Our Proportion Solver does this automatically — just enter any 3 values and it finds the 4th.

        How do I simplify a ratio?

        To simplify a ratio, find the Greatest Common Divisor (GCD) of both numbers and divide each by it. For example, 24 : 36 — the GCD of 24 and 36 is 12. So 24 ÷ 12 = 2 and 36 ÷ 12 = 3, giving the simplified ratio 2 : 3. Our Simplifier automatically finds the GCD and reduces your ratio to its lowest terms.

        What is ratio scaling and when is it useful?

        Scaling a ratio means multiplying both parts by the same factor to create an equivalent, larger (or smaller) ratio. For instance, scaling 2 : 5 by a factor of 3 gives 6 : 15. This is extremely useful for recipes (tripling a recipe), construction (scaling blueprints), mixing solutions, or any scenario where you need to maintain the same proportion at a different magnitude.

        What's the difference between a ratio and a fraction?

        A ratio A : B compares two quantities to each other (part-to-part), while a fraction A/B typically represents a part-to-whole relationship. However, any ratio can be expressed as a fraction: 3 : 4 is equivalent to 3/4 = 0.75. The key difference is context — ratios compare quantities side-by-side, while fractions represent a portion of a total.