Formulas & unit definitions
Base: this tool uses m³/s internally.
- 1 L = 1×10−3 m³
- 1 US gal = 3.785411784 L
- 1 Imp gal = 4.54609 L
- 1 ft³ = 0.028316846592 m³
- 1 in³ = 1.6387064×10−5 m³
Examples
US gpm → L/s: L/s = gpm × 3.785411784 ÷ 60 = gpm × 0.0630901964
m³/h → L/min: L/min = (m³/h × 1000) ÷ 60 = m³/h × 16.6667
FAQ
US vs Imperial gallons?
They are different by ~20%. Choose the correct gallon family (US or Imperial) in the dropdowns.
When to use L/s vs m³/h?
L/s is frequent in lab/process calculations; m³/h is common in HVAC, water, and industrial specifications.
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Formula (extracted text)
Base: this tool uses m³/s internally. 1 L = 1×10−3 m³ 1 US gal = 3.785411784 L 1 Imp gal = 4.54609 L 1 ft³ = 0.028316846592 m³ 1 in³ = 1.6387064×10−5 m³
Variables and units
- No variables provided in audit spec.
Sources (authoritative):
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - NIST — SI units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/metric-si/si-units
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.