Concentrate
1.94 oz
Water
30.06 oz
Ratio
1:16
Mix Recipe (1:16)
1.94 oz
concentrate + 30.06 oz water
Tablespoons
3.9
Teaspoons
11.6
Ratio
1:16
Inputs
Result
V1 = (0.5 × 32) / 8.25 = 1.94 oz concentrate. Water = 32 - 1.94 = 30.06 oz. Ratio = 30.06 / 1.94 = 1:15.
Inputs
Result
V1 = (70 × 32) / 91 = 24.62 oz alcohol. Water = 32 - 24.62 = 7.38 oz.
Standard household bleach (8.25% sodium hypochlorite) diluted to 0.5% makes an effective sanitizer. For a 32 oz spray bottle: mix 2 oz (4 tablespoons) bleach with 30 oz water. This gives a 1:15 ratio suitable for kitchen and bathroom surfaces.
| Use | Target % | Bleach per 32 oz | Ratio |
|---|---|---|---|
| General sanitizing | 0.5% | 2 oz (4 tbsp) | 1:15 |
| Food surfaces | 0.01% | 0.04 oz (1/4 tsp) | 1:800 |
| Mold treatment | 1% | 4 oz (8 tbsp) | 1:7 |
| Laundry boost | 0.25% | 1 oz (2 tbsp) | 1:31 |
The dilution formula is C1×V1 = C2×V2, where C1 is the source concentration, V1 is the concentrate volume needed, C2 is the target concentration, and V2 is the total final volume. Solve for V1: V1 = (C2 × V2) / C1.
91% isopropyl alcohol should be diluted to 70% for optimal disinfecting. For 32 oz at 70%: mix 24.6 oz of 91% alcohol with 7.4 oz water. The 70% concentration is actually more effective than 91% because water helps denature proteins.
Most diluted solutions lose effectiveness over time. Bleach solutions degrade within 24 hours. Diluted hydrogen peroxide lasts 1–2 weeks in a dark container. Vinegar solutions are stable for months. Always label containers with the dilution date.
Explore cleaning, conversion, and everyday tools
Last Updated: Mar 19, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.