Dilution Calculator | Concentrate for 1000× or 500× Dilutions, Making 0.05% Bleach or ppm Solutions, Mixing Two Concentrations
Enter the dilution ratio and the final amount (or the amount of water or concentrate), and it calculates how many ml of concentrate and water you need. It supports both ways of counting: “1000×” on pesticide and fertilizer labels (based on the total amount) and “1 part concentrate : 10 parts water” used for detergents and the like, and shows the concentrate amount in teaspoons, tablespoons, and bottle caps. For diluting by concentration, it calculates in % or ppm how much kitchen chlorine bleach (sodium hypochlorite about 6%) you need for 0.02%, 0.05%, or 0.1% (200–1000 ppm), or how much anhydrous ethanol you need for 70% or 80%. It also includes the ratio for mixing two liquids of different concentrations to hit a target (the cross method / alligation), a back-calculation of the final concentration and ratio from the concentrate and water you actually added, and a dilution chart by sprayer capacity.
Dilute by ratio (500×, 1000×, etc.)
“Dilute 1000 times before use” on pesticide, fertilizer, and gardening labels means the final amount is 1000 times the concentrate. This works out the concentrate and water from your sprayer, watering can, or bottle size.
Concentrate amount
2ml
Water amount
1,998ml (2 L)
Final amount
2,000ml (2 L)
Concentrate 0.1%Water 99.9%
Adding 1 ml of concentrate to 1,000ml (1 L) of water gives nearly the same 1,000× (exactly 1,001×). If the product says “1 part concentrate : 1,000 parts water”, set the switch above to “1 part concentrate : N parts water”.
Cautions when diluting
- Don’t mix chlorine bleach with acidic cleaners or vinegar (it releases toxic gas). Wear gloves and use with ventilation.
- Diluted chlorine solutions lose effectiveness over time, so make a fresh batch each time. When making it in a plastic bottle, label the contents so no one drinks it by mistake.
- Always follow the ratio, amount, and number of applications on pesticide and fertilizer labels. This calculation only converts amounts.
What you enter is only saved in this browser and is not sent to a server.
ABOUT
About Dilution Calculator | Concentrate for 1000× or 500× Dilutions, Making 0.05% Bleach or ppm Solutions, Mixing Two Concentrations
The dilution calculator works out “how many ml of concentrate and how many ml of water” when diluting a liquid with water. “Dilute 1000 times” on pesticide, fertilizer, and gardening labels means the final amount is 1000 times the concentrate (based on the total amount), so for 2 L of finished solution you need 2 ml of concentrate and 1,998 ml of water. You can also switch to the “1 part concentrate : 10 parts water” style used for detergents and similar products. Besides the final amount, you can calculate from a set amount of water or concentrate (such as one capful), and the concentrate amount is also shown in teaspoons, tablespoons, and bottle caps. For diluting by concentration, it calculates in % or ppm: for example, to make kitchen chlorine bleach (sodium hypochlorite about 6%) into 0.05% (500 ppm), you need about 16.7 ml of concentrate for 2 L, and about 33.3 ml for 0.1% (1000 ppm). It also includes how much anhydrous ethanol (99.5%) makes 70%, the ratio for mixing two liquids of different concentrations to hit a target (the cross method / alligation), back-calculating the concentration and ratio of a solution made by eye, and a chart by sprayer capacity (500 ml to 20 L) and ratio (100× to 3000×).
How to use Dilution Calculator | Concentrate for 1000× or 500× Dilutions, Making 0.05% Bleach or ppm Solutions, Mixing Two Concentrations
- 1In “Dilute by ratio”, enter the ratio on the label (e.g. 1000×) and the final amount you want (your sprayer or bottle size)
- 2If the label uses the “1 part concentrate : N parts water” style, switch the counting method to “1 part concentrate : N parts water”
- 3To calculate from the amount of water or concentrate (such as one capful), choose “Set the water amount” or “Set the concentrate amount”
- 4When a concentration is specified, use “Dilute by concentration / ppm” and enter the concentrate’s concentration and the target concentration (% or ppm)
- 5To mix two liquids of different concentrations, use “Mix two liquids” and enter each concentration and the target
- 6To find the concentration of a solution you made, use “Check a solution’s concentration” and enter the concentrate and water you added
- 7Note it down with “Copy result”, or save and share with “Copy the URL for these settings”
Great for
- You want to dilute fertilizer or pesticide 1000× or 500× but don’t know how many ml of concentrate to put in a 4 L sprayer
- Find out how many caps of concentrate you need when making liquid fertilizer in a 2 L bottle
- Make a 0.05% disinfectant from kitchen chlorine bleach to wipe doorknobs and handrails
- Make a 0.1% (1000 ppm) solution for cleaning up vomit, matched to the amount of water in a bucket
- Convert a concentration given in ppm, like 200 ppm, to % and calculate the concentrate amount
- Dilute anhydrous ethanol with purified water to make 70% or 80% alcohol
- Find the ratio for mixing two liquids of different concentrations to get just the right concentration
- Check what ratio and percentage a solution you made by eye actually is
Good to know
- “Dilute N times” on pesticide and fertilizer labels means “final amount ÷ concentrate amount” (based on the total). For 1000×, 1 ml of concentrate plus 999 ml of water makes 1000 ml. Adding 1 ml of concentrate to 1 L of water differs by only about 0.1%, so it’s the same in practice.
- Some detergents and commercial products are written in terms of water added to the concentrate, like “1 part concentrate : 10 parts water”. In that case the final amount is 11 times the concentrate, so switch the counting method before calculating.
- One bottle cap is converted as about 5 ml, a teaspoon as 5 ml, and a tablespoon as 15 ml. Cap sizes vary slightly by product.
- Household chlorine bleach usually contains about 5–6% sodium hypochlorite, but it varies by product and drops over time after opening. Check the bottle label and enter the concentrate’s concentration.
- Sodium hypochlorite solutions release toxic chlorine gas when mixed with acidic cleaners or vinegar. Wear gloves, ventilate, and don’t use it on hands or skin. Metals may rust, so wipe with water afterward.
- Diluted chlorine solutions lose effectiveness over time, so make a fresh batch each time and don’t store it. When making it in a plastic bottle, label the contents so no one drinks it by mistake.
- “Sodium hypochlorite” and “hypochlorous acid water” are different things. This tool’s chlorine bleach calculation is for diluting sodium hypochlorite.
- Ethanol and water shrink slightly in volume when mixed, so concentrations calculated by volume are approximate. To make it precisely, measure by weight.
- 1 ppm is 0.0001%; 0.05% is 500 ppm and 0.1% is 1000 ppm.
- Always follow the ratio, amount, number of applications, and timing written on pesticide labels. This tool only converts amounts.
- What you enter is only saved in this browser and is not sent to a server.
Questions this tool answers
Use Dilution Calculator | Concentrate for 1000× or 500× Dilutions, Making 0.05% Bleach or ppm Solutions, Mixing Two Concentrations for searches like these:
- I want to know how many ml of concentrate for a 1000× dilution
- I want to calculate the concentrate for pesticide or fertilizer to match my sprayer size
- I want to know how many caps when making liquid fertilizer in a plastic bottle
- I want to make a 0.05% or 0.1% disinfectant from chlorine bleach
- I want to know how much to dilute sodium hypochlorite to 200 ppm
- I want to convert ppm and %
- I want to know how much to dilute anhydrous ethanol to 70%
- I want to calculate the ratio for mixing two concentrations
FAQ
- To dilute 1000×, how many ml of concentrate do I put in 2 L of water?
- For 2 L (2000 ml) of finished solution, the concentrate is 2000 ÷ 1000 = 2 ml. Add 1,998 ml of water to 2 ml of concentrate. Adding 2 ml of concentrate to 2 L of water is also about 1000× (exactly 1001×), with no practical difference.
- How much concentrate do I need to make a 500× solution in a 4 L sprayer?
- 4000 ml ÷ 500 = 8 ml. That’s about 1.6 teaspoons, or about 1.6 bottle caps. Fill the sprayer about halfway with water, add the concentrate, then add the remaining water up to 4 L so it mixes well.
- How do I make a 0.05% disinfectant from kitchen chlorine bleach?
- If the concentrate is 6%, dilute it 6 ÷ 0.05 = 120 times. For 2 L of finished solution (one 2 L bottle), the concentrate is 2000 ÷ 120 ≈ 16.7 ml (about 3 caps); for 500 ml, about 4.2 ml (about 1 cap). For a product with 5% concentrate, it’s 100×, or 20 ml for 2 L.
- How do I make a 0.1% (1000 ppm) sodium hypochlorite solution?
- With a 6% concentrate, dilute it 60 times. That’s about 16.7 ml of concentrate for 1 L, and about 83.3 ml for 5 L (a bucket). This concentration is used for cleaning up vomit and the like, and is twice as strong as 0.05%. Make it fresh each time and don’t mix it with acidic cleaners.
- How do I convert between ppm and %?
- 1% = 10,000 ppm. Multiply % by 10,000 to get ppm, and divide ppm by 10,000 to get %. 200 ppm is 0.02%, 500 ppm is 0.05%, and 1000 ppm is 0.1%. In this tool, you can enter the target concentration in either % or ppm.
- How do I dilute anhydrous ethanol to 70%?
- To make 99.5% anhydrous ethanol into 70%, use about 352 ml of anhydrous ethanol and about 148 ml of purified water for 500 ml of finished solution (500 × 70 ÷ 99.5). Ethanol and water shrink slightly in volume when mixed, so the concentration is approximate.
- How do I mix two liquids of different concentrations to get a target concentration?
- Find the ratio with the “cross method” (alligation). To make 60% from an 80% liquid and a 40% liquid, it’s (60 − 40) : (80 − 60) = 20 : 20 = 1 : 1. When diluting with water, treat one side as 0% and calculate the same way.
- Is “1 part concentrate : 10 parts water” the same as “dilute 10 times”?
- No. “1 part concentrate : 10 parts water” makes a final amount 11 times the concentrate, which is 11× by the label counting method (based on the total). “Dilute 10 times” (based on the total) is 1 part concentrate : 9 parts water. Switch the tool to “1 part concentrate : N parts water” to calculate in this style.
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