Convert 1000 Revolutions/Hour (rph) to Kilohertz (kHz).

1000 Revolutions/Hour equals 0.000278 Kilohertz. Multiply 1000 by 2.777778e-7.

1000 Revolutions/Hour = 0.000278 Kilohertz

Worked example: converting Revolutions/Hour to Kilohertz

Step 1 — start with the formula. kHz = rph × 2.777778e-7
Step 2 — substitute your figure. 1000 rph × 2.777778e-7
Step 3 — read the result. 1000 rph = 0.000278 kHz
Step 4 — check it in reverse. rph = kHz × 3,600,000 returns 1,000.8 rph, which matches the figure you started with.

Frequency Converter

13 units available

Decimals:

From

To

0.000278

1000 rph = 0.000278 kHz

Formula:

kHz = rph × 2.777778e-7

With your value: 1000 rph = 0.00027778 kHz

Other Revolutions/Hour to Kilohertz conversions

90 rph to kHz 96 rph to kHz 100 rph to kHz 120 rph to kHz 150 rph to kHz 200 rph to kHz 500 rph to kHz Full Revolutions/Hour to Kilohertz converter

Revolutions/Hour to Kilohertz Conversion Table

Revolutions/Hour (rph)	Kilohertz (kHz)
0.5	1.388889e-7
1	2.777778e-7
2	5.555556e-7
5	1.388889e-6
10	2.777778e-6
15	4.166667e-6
20	5.555556e-6
25	6.944444e-6
50	1.388889e-5
100	2.777778e-5
250	6.944444e-5
500	0.000139
1000	0.000278

Kilohertz to Revolutions/Hour Conversion Table

Kilohertz (kHz)	Revolutions/Hour (rph)
0.5	1,800,000
1	3,600,000
2	7,200,000
5	18,000,000
10	36,000,000
15	54,000,000
20	72,000,000
25	90,000,000
50	180,000,000
100	360,000,000
250	900,000,000
500	1,800,000,000
1000	3,600,000,000

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Revolutions/Hour (rph)

Frequency

SI definition

Derived from the hertz (1 Hz = 1 s⁻¹), traceable to the SI second.

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

Kilohertz (kHz)

Frequency

SI definition

Derived from the hertz (1 Hz = 1 s⁻¹), traceable to the SI second.

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Revolutions/Hour to Kilohertz

To convert from Revolutions/Hour (rph) to Kilohertz (kHz), multiply the value by 2.777778e-7.

Formula: kHz = rph × 2.777778e-7

Reverse: rph = kHz × 3,600,000

Step-by-Step Example

Start with your value in Revolutions/Hour. For example: 5 rph
Multiply by the conversion factor: 5 x 2.777778e-7
The result is: 1.388889e-6 kHz

About Revolutions/Hour

The revolutions/hour (rph) is a unit of frequency. One revolutions/hour equals 0.0002777777778 hertzs. UnitConvertLab converts it against every other frequency unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: frequency calculations, engineering and science, education.

About Kilohertz

The kilohertz (kHz) is a unit of frequency. One kilohertz equals 1000 hertzs. UnitConvertLab converts it against every other frequency unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: frequency calculations, engineering and science, education.

Frequently Asked Questions

What is 1000 Revolutions/Hour in Kilohertz?

1000 Revolutions/Hour equals 0.000278 Kilohertz.

How many Kilohertz are in 1 Revolutions/Hour?

There are exactly 2.777778e-7 Kilohertz in 1 Revolutions/Hour. This means the conversion factor from Revolutions/Hour to Kilohertz is 2.777778e-7.

What is the formula to convert Revolutions/Hour to Kilohertz?

The formula to convert Revolutions/Hour to Kilohertz is: kHz = rph × 2.777778e-7. For example, to convert 10 Revolutions/Hour to Kilohertz, you would multiply 10 by 2.777778e-7.

What is a Revolutions/Hour?