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Liters/hour to Gallons (us)/hour Converter (L/h to gal (US)/h)

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Live Conversion • ISO 80000-4:2019 Certified
1 Liter/hour = 0.26417205 Gallon (US)/hour
1 L/h = 0.264172 gal (US)/h • 1 gal (US)/h = 3.785412 L/h
Liter/hour to Gallon (US)/hour: One Liter/hour is equal to 0.26417205 Gallons (us)/hour.
Certified Authority Value
0.26417205
gal (US)/h
Exact: 1 gal (US)/h ≡ 3.785411784 L/h
L/h
L/h
Swap to Gallon (US)/hour to Liter/hour
Swap to Gallon (US)/hour to Liter/hour
gal (US)/h
gal (US)/h 0.26417205
Quick Values:
Conversion Formula
To convert Liter/hour to Gallon (US)/hour, multiply by 0.26417205
L/h × 0.26417205 = gal (US)/h

Calculation: 1 L/h × 0.26417205 = 0.26417205 gal (US)/h

Common Liter/hour to Gallon (US)/hour Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Liter/hour (L/h) and Gallon (US)/hour (gal (US)/h).

Tap any row to calculate
Liter/hour to Gallon (US)/hour: Primary Direct Table (15 Steps)
Liter/hour to Gallon (US)/hour Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 L/h 0.000264172 gal (US)/h 2.642 × 10⁻⁴
0.01 L/h 0.00264172 gal (US)/h 2.642 × 10⁻³
0.1 L/h 0.0264172 gal (US)/h 2.642 × 10⁻²
0.5 L/h 0.132086 gal (US)/h 1.321 × 10⁻¹
1 L/h 0.264172 gal (US)/h 2.642 × 10⁻¹
2 L/h 0.528344 gal (US)/h 5.283 × 10⁻¹
5 L/h 1.32086 gal (US)/h 1.321 × 10⁰
10 L/h 2.641721 gal (US)/h 2.642 × 10⁰
20 L/h 5.283441 gal (US)/h 5.283 × 10⁰
25 L/h 6.604301 gal (US)/h 6.604 × 10⁰
50 L/h 13.208603 gal (US)/h 1.321 × 10¹
100 L/h 26.417205 gal (US)/h 2.642 × 10¹
250 L/h 66.043013 gal (US)/h 6.604 × 10¹
500 L/h 132.086026 gal (US)/h 1.321 × 10²
1000 L/h 264.172052 gal (US)/h 2.642 × 10²
Gallon (US)/hour to Liter/hour: Reciprocal Summary
Gallon (US)/hour to Liter/hour Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 gal (US)/h 3.785412 L/h 3.785 × 10⁰
5 gal (US)/h 18.927059 L/h 1.893 × 10¹
10 gal (US)/h 37.854118 L/h 3.785 × 10¹
50 gal (US)/h 189.270589 L/h 1.893 × 10²
100 gal (US)/h 378.541178 L/h 3.785 × 10²
View Complete 15-Row Gallon (US)/hour to Liter/hour Table

Real-World Context & Everyday Benchmarks

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To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Liter/hour (L/h) and Gallon (US)/hour (gal (US)/h):

Liter/hour References:

  • Agricultural drip irrigation emitter delivery rate for vineyard grapevines 4 L/h
  • Residential whole-home evaporative central furnace humidifier water feed 3 L/h

Gallon (US)/hour References:

  • Marine inboard diesel boat engine cruising speed fuel consumption burn rate 12 gal/h
  • Residential whole-home central furnace humidifier continuous water feed 0.75 gal/h

Tap any benchmark above to automatically calculate its exact equivalent in Gallon (US)/hour.

ISQ Dimension: [L³ T⁻¹] Coherent SI Unit: cubic meter per second (m³/s) Fluid Dynamics & Rheology

How to Convert Liter/hour to Gallon (US)/hour

Converting Liter/hour (L/h) to Gallon (US)/hour (gal (US)/h) is a core calculation in Volumetric Flow Rate, which quantifies the volume of fluid passing through a designated conduit cross-section per unit of time. This calculation navigates the boundary between the International Metric System (SI) and British Imperial / US Customary engineering standards. In contemporary metrology, Imperial units are defined in terms of exact SI standards via international agreements—notably NIST SP 811 and the 1959 International Yard and Pound Agreement. Exactly 1 Liter/hour equals 0.264172 Gallon (US)/hour, while 1 gal (US)/h equals 3.785412 L/h.

Direct Factor1 L/h = 0.264172 gal (US)/h
Inverse Ratio1 gal (US)/h = 3.785412 L/h
Conversion ScaleMetric SI to British Imperial / US Customary Bridge
First-Principles SI Derivation ProofNIST SP 811 / ISO 80000 Compliance

Mathematical Conversion Derivation via Coherent SI Base Unit

Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (cubic meter per second (m³/s)) without arbitrary rounding:

Vtarget=Vsource×(ksource→SIktarget→SI)V_{\text{target}} = V_{\text{source}} \times \left( \frac{k_{\text{source} \to \text{SI}}}{k_{\text{target} \to \text{SI}}} \right)
Universal Dimensional Conversion Law (ISO 80000 / NIST SP 811)
1. Source SI Bridge (ksource):1 L/h = 2.777778 × 10⁻⁷ cubic meter per second (m³/s)
2. Target SI Bridge (ktarget):1 gal (US)/h = 1.051503 × 10⁻⁶ cubic meter per second (m³/s)
Step-by-step substitution for Liter/hour → Gallon (US)/hour:V(gal (US)/h) = V(L/h) × ( 2.777778 × 10⁻⁷ / 1.051503 × 10⁻⁶ ) = V(L/h) × 0.264172
Mathematical FormulaValue in Gallon (US)/hour = Value in Liter/hour × 0.26417205Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 2.5 Liter/hour (L/h) produces 0.66043 Gallon (US)/hour (gal (US)/h). In heavy-duty utility and industrial workloads, 100 L/h equals 26.417205 gal (US)/h.

Inverse check: 1 gal (US)/h = 3.785412 L/h.

Understanding Liter/hour and Gallon (US)/hour

Liter/hour

L/h
Standard Unit

A Liter/hour (L/h) is a recognized unit for volumetric flow rate.

Applications & Practical Context

In practical flow terms, a agricultural drip irrigation emitter delivery rate for vineyard grapevines equals 4 L/h, a residential whole-home evaporative central furnace humidifier water feed equals 3 L/h.

Physical Setup

A physical magnitude of 1 L/h corresponds to 2.777778 × 10⁻⁷ m³/s in standard SI measurement.

Conversion to SI Unit: cubic meter per second (m³/s)
1 L/h = 2.777778 × 10⁻⁷ m³/s

Gallon (US)/hour

gal (US)/h
Imperial / US

A Gallon (US)/hour (gal (US)/h) is an imperial and US customary unit for volumetric flow rate.

Applications & Practical Context

In practical flow terms, a marine inboard diesel boat engine cruising speed fuel consumption burn rate equals 12 gal/h, a residential whole-home central furnace humidifier continuous water feed equals 0.75 gal/h.

Physical Setup

A physical magnitude of 1 gal (US)/h corresponds to 1.051503 × 10⁻⁶ m³/s in standard SI measurement.

Conversion to SI Unit: cubic meter per second (m³/s)
1 gal (US)/h = 1.051503 × 10⁻⁶ m³/s

Domain Metrology & Engineering Applications

Governing Law & Equation

Hydrodynamic Continuity Equation (Q = A · v̄)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using electromagnetic inductive flowmeters, ultrasonic transit-time meters, turbine flowmeters, and differential orifice plates.

Primary Industry Sectors

Applied across municipal water supply distribution, chemical process loops, oil & gas pipeline custody transfer, and HVAC hydronic balancing under international metrology standard ISO 80000-4:2019, ASME MFC-3M.

Physical Orders of Magnitude & Laboratory Reference Benchmarks

Physical Phenomenon / Engineering ReferenceReference ValueConverted to Gallon (US)/hour
Agricultural drip irrigation emitter delivery rate for vineyard grapevines4 L/h1.056688 gal (US)/h
Residential whole-home evaporative central furnace humidifier water feed3 L/h0.792516 gal (US)/h
Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-4:2019, ASME MFC-3M and the BIPM SI Brochure (9th Edition). Governed by Hydrodynamic Continuity Equation (Q = A · v̄) under ISO 80000 dimensional vector [L³ T⁻¹].

Multi-Variable Engineering Bridge Fluid Continuity & Mass Flux

Volumetric to Mass Flow Continuity Bridge (kg/s • kg/h • lb/s • lb/h • t/h • g/s)

Convert volumetric flow rate (Q) directly into physical mass flow rate (ṁ) across process fluids using the continuity relation ṁ = ρ × Q, bridging volume flow [L³ T⁻¹] and mass flow [M T⁻¹] via density (ρ).

ṁ = ρ × Q
Vector: [m³/s] × [kg/m³] → [kg/s]
Live Calculated Bridge Equivalent:
1 L/h at Water (20°C / Standard Ambient) = 0.0002773 kg/s
Equals 0.9982 kg/h • 0.0006113 lb/s • 2.2 lb/h
SI Mass Flow
0.0002773
kg/s
Kilograms per Second
Industrial Process
0.9982
kg/h
Kilograms per Hour
US Mass Flow
0.0006113
lb/s
Pounds per Second
Boiler / Turbine Rating
2.2
lb/h
Pounds per Hour
Heavy Plant Header
0.0009982
t/h
Metric Tons per Hour
Chemical / Laboratory
0.2773
g/s
Grams per Second
  1. 1. Normalize Input to SI Base Unit (m³/s):
    Q = 1 L/h × 2.77777778 × 10⁻⁷ = 2.77777778 × 10⁻⁷ m³/s
  2. 2. Apply Engineering Parameter (ρ):
    Selected condition: Water (20°C / Standard Ambient) at ρ = 998.2 kg/m³
  3. 3. Execute Governing Physical Law in SI Units:
    ṁ = ρ × Q = (2.77777778 × 10⁻⁷ m³/s) × (998.2 kg/m³) = 0.00027728 kg/s
  4. 4. Convert to Standard Engineering Units:
    • kg/s: 0.00027728 × 1 = 0.0002773 kg/s (Kilograms per Second) • kg/h: 0.00027728 × 3600 = 0.9982 kg/h (Kilograms per Hour) • lb/s: 0.00027728 × 2.2046 = 0.0006113 lb/s (Pounds per Second) • lb/h: 0.00027728 × 7936.6414 = 2.2 lb/h (Pounds per Hour) • t/h: 0.00027728 × 3.6 = 0.0009982 t/h (Metric Tons per Hour) • g/s: 0.00027728 × 1000 = 0.2773 g/s (Grams per Second)
Explore Full Density Converter →
Engineering Substance / Operating Standard Parameter Value (kg/m³) Reference State / Condition Typical Industrial & Engineering Application
Water (20°C / Standard Ambient) 998.2 998.2 kg/m³ HVAC hydronic & cooling water
Diesel Fuel (EN 590 / 20°C) 832 832.0 kg/m³ Generator & marine diesel consumption
Gasoline / Petrol (15°C) 740 740.0 kg/m³ Automotive fuel injection lines
Hydraulic Fluid (ISO VG 46) 870 870.0 kg/m³ Hydraulic power pack pumps
Air (Standard Ambient / NTP 20°C) 1.204 1.204 kg/m³ HVAC ductwork & compressor air
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Frequently Asked Questions

There are exactly 0.26417205 gallons (us)/hour (gal (US)/h) in 1 liter/hour (L/h). To calculate larger amounts manually, simply multiply your total number of liters/hour by the conversion multiplier of 0.26417205.

The mathematical formula to convert liters/hour to gallons (us)/hour is: [value] * 0.26417205 = gallons (us)/hour. Rather than doing the math manually, you can use our high-precision online calculator to process this exact equation instantly without rounding errors.

To perform the reverse calculation from gallons (us)/hour back to liters/hour, you must divide your starting value by 0.26417205. Our bidirectional tool automatically computes this inverse equation the moment you type into the gallon (us)/hour input field.

1 Gallon (US)/hour is larger than 1 Liter/hour. Specifically, 1 Liter/hour equals 0.26417205 gallons (us)/hour, meaning 1 Gallon (US)/hour is 3.7854 times larger than 1 Liter/hour (a difference of 0.58 orders of magnitude). Expressing measurements in liters/hour requires a larger numerical value to represent the equivalent physical magnitude.

A typical agricultural drip irrigation emitter delivery rate for vineyard grapevines measures 4 L/h, which corresponds to 1.0567 Gallon Us Per Hour (Gallon (US)/hour).

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