Spray Mix Calculator

Mix sealers, curing agents, or cleaners with confidence. Choose ratio, percent, or label rate easily. See exact water and concentrate amounts for every tank.

Inputs Choose one mix basis, then fill supporting fields.
Use the method that matches product guidance.
Inputs are interpreted using this unit.
Total volume you plan to prepare.
Used to estimate number of refills.
Adds allowance for hose, overspray, and cleanup.
Used to estimate concentrate cost.
Concentrate volume ÷ total volume × 100.
Often used for admixtures and cleaners.
Example: 1:15 means 1 part concentrate, 15 parts water.
Used to estimate required volume.
Typical for coatings depends on product and surface.
Example data
Use case Total mix Basis Setting Tank size Waste Concentrate result
Curing compound dilution 200 L Ratio 1:15 15 L 5% ≈ 13.33 L (+5% = 14.00 L)
Surface cleaner batch 120 L Label rate 20 mL/L 12 L 8% ≈ 2.40 L (+8% = 2.59 L)
Sealer light coat mix 60 gal Percent 3% 5 gal 5% ≈ 6.81 L (+5% = 7.15 L)
Examples are illustrative only. Always follow the specific product label and jobsite requirements.
Formula used
  • Total_L = convert(total mix, selected units → liters)
  • WasteFactor = 1 + (Waste% / 100)
  • Percent method: Conc_L = Total_L × (Percent / 100)
  • Label method: Conc_L = Total_L × (mL_per_L / 1000)
  • Ratio method (1:N): Conc_L = Total_L / (1 + N)
  • Water_L = Total_L − Conc_L
  • Adjusted values = each value × WasteFactor
  • TankLoads = ceil(AdjustedTotal_L / TankSize_L)
  • CoverageNeeded_L = Area_m2 × AppRate_L_per_m2 (optional)
  • ConcentrateCost = AdjustedConc_L × PricePerLiter (optional)
How to use this calculator
  1. Select the mix basis that matches your product instructions.
  2. Choose units, then enter the total mix volume.
  3. Enter tank size to estimate the number of refills.
  4. Add a waste factor to cover overspray and leftover loss.
  5. Fill only the fields needed for your selected basis.
  6. Optionally enter area and application rate for coverage checking.
  7. Press Submit to see results above this form.
  8. Use Download buttons to export CSV or PDF.

Batch planning for consistent coverage

Accurate batch planning reduces stoppages and uneven finishes on slabs, walls, and steelwork. By entering the intended total volume, the calculator converts units and separates concentrate from water. Optional area and application rate inputs help you align prepared volume with coverage demand, limiting dry edges and rework.

Choosing the right mixing basis

Construction products specify dilution in different ways. Percent-by-volume is common for additives and certain sealers. Label rate in milliliters per liter is typical for cleaners or corrosion inhibitors. Ratio mixing, expressed as 1:N, is widely used for curing compounds and release agents. Selecting the correct basis keeps the mix aligned with manufacturer intent. If a label lists a range and a maximum, plan around the stricter value.

Managing waste and tank refills

Overspray, hose hold-up, and container residue can consume more material than expected. The waste factor adds an allowance to total mix, concentrate, and water so your crew stays productive. The tank size input estimates refill loads using a ceiling calculation, helping you stage water supply and measure containers. Use the load count to pre-stage measured concentrate bottles, then top up with water to the final mark.

Quality control and documentation

Consistent results require repeatable measuring. Use calibrated jugs, marked mixing drums, and a simple check sheet that records date, crew, substrate, weather, and batch settings. Exporting CSV creates an audit trail. The PDF summary is useful for daily reports and handover packages. For high-visibility work, run a trial batch, confirm fan pattern and nozzle size, then lock the settings for the shift.

Safety and compliance considerations

Even “water based” mixes can be hazardous. Confirm compatibility with the sprayer, keep agitation, and respect pot life. Use proper PPE, control drift near traffic and adjacent trades, and prevent runoff into drains. Dispose of rinse water and empty containers according to local rules. Avoid mixing in confined spaces without ventilation, and store concentrates away from heat and sunlight.

FAQs

1) Which basis should I choose for my product?

Use the basis shown on the product label. If guidance is given as percent, select percent. If it lists mL per liter, select label rate. If it states 1:N, select ratio.

2) Does the calculator include extra volume for losses?

Yes. The waste factor increases total mix, concentrate, and water to cover overspray, hose hold-up, and leftover material. Set it to zero if you want a strict theoretical quantity.

3) How are tank refills calculated?

Refills equal the adjusted total volume divided by tank size, rounded up. Rounding up ensures you plan enough loads to complete the work without running short.

4) Can I use gallons instead of liters?

Yes. Choose US gallons in the units selector. The tool converts internally and still reports liters and gallons in the results for quick verification.

5) How do I estimate coverage volume needed?

Enter the area in square meters and the application rate in liters per square meter. The calculator multiplies them to show the minimum liquid volume required for the target coverage.

6) Is the PDF export acceptable for formal submittals?

It is a simple one-page summary for field records. For formal documentation, attach the product label, method statement, and your batch logs, then include the PDF as supporting evidence.

© 2026 Spray Mix Calculator. Use at your own risk.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.