Radians/hour to Revolutions/hour Converter (rad/h to rev/h)

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Live Conversion • ISO 80000-3:2019 Certified

1 Radian/hour = 0.15915494 Revolution/hour

1 rad/h = 0.159155 rev/h • 1 rev/h = 6.283185 rad/h

Decimals:

Certified Authority Value

0.15915494

rev/h

From / Input

rad/h

Swap to Revolution/hour to Radian/hour

To / Result

rev/h

Quick Values:

Conversion Formula

To convert Radian/hour to Revolution/hour, multiply by 0.15915494

rad/h × 0.15915494 = rev/h

Calculation: 1 rad/h × 0.15915494 = 0.15915494 rev/h

Common Radian/hour to Revolution/hour Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Radian/hour (rad/h) and Revolution/hour (rev/h).

Tap any row to calculate

Radian/hour to Revolution/hour: Primary Direct Table (15 Steps)

Rule: 1 Radian/hour is equal to 0.159155 rev/h (Revolution/hour)

Radian/hour to Revolution/hour Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 rad/h 0.000159155 rev/h	1.592 × 10⁻⁴
0.01 rad/h 0.00159155 rev/h	1.592 × 10⁻³
0.1 rad/h 0.0159155 rev/h	1.592 × 10⁻²
0.5 rad/h 0.0795775 rev/h	7.958 × 10⁻²
1 rad/h 0.159155 rev/h	1.592 × 10⁻¹
2 rad/h 0.31831 rev/h	3.183 × 10⁻¹
5 rad/h 0.795775 rev/h	7.958 × 10⁻¹
10 rad/h 1.591549 rev/h	1.592 × 10⁰
20 rad/h 3.183099 rev/h	3.183 × 10⁰
25 rad/h 3.978874 rev/h	3.979 × 10⁰
50 rad/h 7.957747 rev/h	7.958 × 10⁰
100 rad/h 15.915494 rev/h	1.592 × 10¹
250 rad/h 39.788736 rev/h	3.979 × 10¹
500 rad/h 79.577472 rev/h	7.958 × 10¹
1000 rad/h 159.154943 rev/h	1.592 × 10²

Revolution/hour to Radian/hour: Reciprocal Summary

Rule: 1 Revolution/hour is equal to 6.283185 rad/h (Radian/hour)

Revolution/hour to Radian/hour Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 rev/h 6.283185 rad/h	6.283 × 10⁰
5 rev/h 31.415927 rad/h	3.142 × 10¹
10 rev/h 62.831853 rad/h	6.283 × 10¹
50 rev/h 314.159265 rad/h	3.142 × 10²
100 rev/h 628.318531 rad/h	6.283 × 10²

View Complete 15-Row Revolution/hour to Radian/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 Radian/hour (rad/h) and Revolution/hour (rev/h):

Radian/hour References:

Minute hand on traditional analog clock rotational velocity 6.28 rad/h
Hour hand on traditional analog clock rotational velocity 0.524 rad/h
Earth diurnal axial rotation angular rate (15 degrees/hour) 0.262 rad/h

Revolution/hour References:

Analog clock minute hand complete revolutions per hour 1 rev/h
London Eye passenger observation wheel rotation rate 2 rev/h

Tap any benchmark above to automatically calculate its exact equivalent in Revolution/hour.

ISQ Dimension: [T⁻¹] Coherent SI Unit: radian per second (rad/s) Classical Mechanics & Dimensional Metrology

How to Convert Radian/hour to Revolution/hour

Converting Radian/hour (rad/h) to Revolution/hour (rev/h) is a core calculation in Angular Velocity, which measures the rotational speed and rate of angular displacement per unit of time. Because Revolution/hour is a broader physical scale than Radian/hour, converting from rad/h to rev/h condenses the numerical figure. It takes 6.283185 Radian/hour to equal a single Revolution/hour (1 rad/h = 0.159155 rev/h). To convert any quantity, multiply by 0.159155 (or divide by 6.283185).

Direct Factor1 rad/h = 0.159155 rev/h

Inverse Ratio1 rev/h = 6.283185 rad/h

Conversion ScaleDirect Proportional Magnitude Compression

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 (radian per second (rad/s)) without arbitrary rounding:

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 (k_source):1 rad/h = 0.000277778 radian per second (rad/s)

2. Target SI Bridge (k_target):1 rev/h = 0.00174533 radian per second (rad/s)

Step-by-step substitution for Radian/hour → Revolution/hour:V(rev/h) = V(rad/h) × ( 0.000277778 / 0.00174533 ) = V(rad/h) × 0.159155

Mathematical FormulaValue in Revolution/hour = Value in Radian/hour × 0.15915494Direct computational formula applied for standard conversion.

Worked Example

To convert 120 Radian/hour (rad/h) to Revolution/hour (rev/h): multiply 120 by 0.159155 to get 19.098593 rev/h. At an industrial engineering scale, 480 rad/h converts to 76.394373 rev/h.

Inverse check: 1 rev/h = 6.283185 rad/h.

Understanding Radian/hour and Revolution/hour

Domain Metrology & Engineering Applications

Governing Law & Equation

Rotational Kinematics Relation (ω = dθ/dt)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using optical non-contact tachometers, stroboscopes, and resolver feedback transducers.

Primary Industry Sectors

Applied across electric motor drives, wind turbine generator monitoring, centrifuge engineering, and automotive drivetrains under international metrology standard ISO 80000-3:2019.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-3:2019 and the BIPM SI Brochure (9th Edition). Governed by Rotational Kinematics Relation (ω = dθ/dt) under ISO 80000 dimensional vector [T⁻¹].

Multi-Variable Engineering Bridge Drivetrain Engineering & Shaft Power

Angular Velocity to Mechanical Power Bridge (Watts • Kilowatts • Horsepower)

Calculate total shaft power output P = τ × ω across standard torque load ratings, bridging rotational velocity [T⁻¹] with power [M L² T⁻³].

Input Rotational Angular Velocity (ω): rad/h

Select Applied Shaft Torque: 250 N·m

Governing Law: P = τ × ω

Vector: [rad/s] × [N·m] → [W]

Live Calculated Bridge Equivalent:

1 rad/h at Passenger Car Engine (250 N·m) = 0.06944 W

Equals 6.9444 × 10⁻⁵ kW • 6.944444 × 10⁻⁸ MW • 9.3127 × 10⁻⁵ hp

SI Power

0.06944

Watts

Grid / Utility

6.9444 × 10⁻⁵

Kilowatts

Power Plant

6.944444 × 10⁻⁸

Megawatts

Mechanical Rating

9.3127 × 10⁻⁵

Horsepower (Mechanical)

Metric Horsepower

9.4418 × 10⁻⁵

Metric Horsepower (PS)

HVAC Thermal Rating

0.24

BTU/h

BTU per Hour

Step-by-Step Numerical Derivation Proof View Derivation

1. Normalize Input to SI Base Unit (rad/s):
ω = 1 rad/h × 0.00027778 = 0.00027778 rad/s
2. Apply Engineering Parameter (τ):
Selected condition: Passenger Car Engine (250 N·m) at τ = 250 N·m
3. Execute Governing Physical Law in SI Units:
P = τ × ω = (0.00027778 rad/s) × (250 N·m) = 0.0694444 W
4. Convert to Standard Engineering Units:
• W: 0.0694444 × 1 = 0.06944 W (Watts) • kW: 0.0694444 × 0.001 = 6.9444 × 10⁻⁵ kW (Kilowatts) • MW: 0.0694444 × 1 × 10⁻⁶ = 6.944444 × 10⁻⁸ MW (Megawatts) • hp: 0.0694444 × 0.001341 = 9.3127 × 10⁻⁵ hp (Horsepower (Mechanical)) • PS: 0.0694444 × 0.00136 = 9.4418 × 10⁻⁵ PS (Metric Horsepower (PS)) • BTU/h: 0.0694444 × 3.4121 = 0.24 BTU/h (BTU per Hour)

Explore Full Torque Converter →

Engineering Substance / Operating Standard	Parameter Value (N·m)	Reference State / Condition	Typical Industrial & Engineering Application
Automation Servo Motor (2 N·m)	`2`	2.0 N·m	Packaging & robotics joint servo
Passenger Car Engine (250 N·m)	`250`	250.0 N·m	Typical 2.0L turbo automobile engine
Commercial Diesel Semi Truck (1,200 N·m)	`1200`	1,200 N·m	Heavy freight turbo diesel engine
Marine Propulsion Shaft (25,000 N·m)	`25000`	25,000 N·m	Container vessel direct drive shaft

Frequently Asked Questions

There are exactly 0.15915494 revolutions/hour (rev/h) in 1 radian/hour (rad/h). To calculate larger amounts manually, simply multiply your total number of radians/hour by the conversion multiplier of 0.15915494.

The mathematical formula to convert radians/hour to revolutions/hour is: [value] * 0.15915494 = revolutions/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 revolutions/hour back to radians/hour, you must divide your starting value by 0.15915494. Our bidirectional tool automatically computes this inverse equation the moment you type into the revolution/hour input field.

1 Revolution/hour is larger than 1 Radian/hour. Specifically, 1 Radian/hour equals 0.15915494 revolutions/hour, meaning 1 Revolution/hour is 6.2832 times larger than 1 Radian/hour (a difference of 0.80 orders of magnitude). Expressing measurements in radians/hour requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Radian/hour converts to 0.15915494 revolutions/hour. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.