Hot Water Mixing Calculator: 1.5 gpm to 105°F (50°F cold / 140°F hot)

Specific conversion page with reference context, calculator, and nearby values.

Author

Dr. Elif Yilmaz

Plumbing editorial contributor

Turkish computational biologist at the Max Planck Institute, mapping gene regulatory networks in rare diseases

Reviewed by

Prof. Zara Khan

Plumbing content reviewer

Pakistani-British education researcher at Cambridge, evaluating digital literacy programs in South Asian rural schools

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

1.5 gpm to 105°F (50°F cold / 140°F hot) converts to

0.917 gpm hot + 0.583 gpm cold

Use this as a quick reference for Hot Water Mixing Calculator.

Value Details

Input: 1.5 gpm to 105°F (50°F cold / 140°F hot)

Output: 0.917 gpm hot + 0.583 gpm cold

Browse all reference values for Hot Water Mixing Calculator

hotPercent: 61.11 | coldPercent: 38.89 | targetTempF: 105

Hot Water Mixing Calculator

Estimate hot and cold flow rates needed to achieve a target mixed-water temperature.

Required Hot Flow

Nearby Reference Values

Hot Water Mixing Calculator values near 1.5 gpm to 105°F (50°F cold / 140°F hot)
Mix ScenarioFlow SplitHot Water (%)Cold Water (%)
1.5 gpm to 100°F (50°F cold / 130°F hot)0.938 gpm hot + 0.563 gpm cold62.5%37.5%
1.5 gpm to 105°F (50°F cold / 130°F hot)1.031 gpm hot + 0.469 gpm cold68.75%31.25%
1.5 gpm to 110°F (50°F cold / 130°F hot)1.125 gpm hot + 0.375 gpm cold75%25%
1.5 gpm to 95°F (50°F cold / 140°F hot)0.75 gpm hot + 0.75 gpm cold50%50%
1.5 gpm to 100°F (50°F cold / 140°F hot)0.833 gpm hot + 0.667 gpm cold55.56%44.44%
1.5 gpm to 105°F (50°F cold / 140°F hot)0.917 gpm hot + 0.583 gpm cold61.11%38.89%
1.5 gpm to 110°F (50°F cold / 140°F hot)1 gpm hot + 0.5 gpm cold66.67%33.33%
1.5 gpm to 95°F (60°F cold / 120°F hot)0.875 gpm hot + 0.625 gpm cold58.33%41.67%
1.5 gpm to 100°F (60°F cold / 120°F hot)1 gpm hot + 0.5 gpm cold66.67%33.33%
1.5 gpm to 105°F (60°F cold / 120°F hot)1.125 gpm hot + 0.375 gpm cold75%25%
1.5 gpm to 110°F (60°F cold / 120°F hot)1.25 gpm hot + 0.25 gpm cold83.33%16.67%

Frequently Asked Questions

Common questions about Hot Water Mixing Calculator, formulas, and expected usage.

How is hot-water mixing calculated?

The hot-water fraction is (target minus cold) divided by (hot minus cold), then multiplied by total flow.

Why must target temperature be between hot and cold inputs?

A mixed temperature outside the source range is physically impossible without heating or cooling beyond the two source streams.

What is this calculator useful for?

It is useful for tempering-valve setup, domestic hot water balancing, and estimating required hot-water capacity.

Does this include pipe heat loss?

No. This is an ideal mixing calculation at the blending point and does not include downstream heat loss.

Methodology and Review

This page is generated from the same conversion definition used by the main calculator page, which keeps the calculator, reference table rows, and FAQ schema aligned.

Reviewer and update metadata are shown above and included in structured data. See our editorial policy, review process, and corrections policy.

Use this page as a fast lookup reference, then confirm final project values using applicable standards and manufacturer documentation.