Convert Turns per Meter to Turns per Foot (TPM to TPF)
1 turn per metre (TPM) = 0.3048 turns per foot (TPF). 1 TPF = 3.280839895 TPM. Example: 15 TPM = 15 × 0.3048 = 4.572 TPF.
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1 TPM = 0.3048 TPF
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk turn per metre to turn per foot converter to paste a column from Excel.
How to Convert Turn per Meter to Turn per Foot
- 1 TPM = 0.3048 TPF
- 1 TPF = 3.280839895 TPM
- Example: convert 15 TPM to TPF: 15 TPM = 15 × 0.3048 TPF = 4.572 TPF
Formula
TPF = TPM × 0.3048
or TPF = TPM ÷ 3.280839895013
Derivation from SI units:
- The SI-based unit of twist: complete turns of the yarn about its axis per metre of length.
- 1 turn per foot = 1 turn per 0.3048 m = 3.280839895 TPM (exact)
Both units are defined exactly, so the factor is exact. Turn per Meter definition: turn per metre; Turn per Foot definition: turn per foot.
Worked examples
- A reading of 400 TPM converts to 121.92 TPF.
400 TPM × 0.3048 = 121.92 TPF - A value of 700 TPM is 213.36 TPF.
700 TPM × 0.3048 = 213.36 TPF
Turn per Meter to Turn per Foot conversion table
| Turns per Meter (TPM) | Turns per Foot (TPF) |
|---|---|
| 100 TPM | 30.48 TPF |
| 200 TPM | 60.96 TPF |
| 300 TPM | 91.44 TPF |
| 400 TPM | 121.92 TPF |
| 500 TPM | 152.4 TPF |
| 600 TPM | 182.88 TPF |
| 700 TPM | 213.36 TPF |
| 800 TPM | 243.84 TPF |
| 1000 TPM | 304.8 TPF |
| 1200 TPM | 365.76 TPF |
Where it's used
Turns per Meter are used for spinning and twisting specifications in metric mills, while turns per foot appear in cords, ropes and tyre cords. Both measure yarn twist (turns per unit length), so the conversion is a fixed factor.
Turn per Meter to other yarn twist units
| Conversion | 1 TPM equals |
|---|---|
| turn per metre to turn per foot | 0.3048 TPF |
| turn per metre to turn per inch | 0.0254 TPI |
| turn per metre to turn per centimetre | 0.01 TPcm |
Frequently asked questions
How many turns per foot are in 1 turn per metre?
1 TPM = 0.3048 TPF.
How do I convert turns per metre to turns per foot?
Multiply the value in TPM by 0.3048, or divide it by 3.280839895. For example, 15 TPM × 0.3048 = 4.572 TPF.
Is the TPM to TPF conversion exact?
Yes. Both units are defined exactly, and 1 TPM is exactly 0.3048 TPF.
Sources
- ISO 1144, Textiles — Universal system for designating linear density (Tex System), International Organization for Standardization , Metric designation of yarn twist.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Turns per Meter to Turns per Foot (TPM to TPF). Retrieved October 25, 2026, from https://scientificconverters.com/yarn-twist/turns-per-meter-to-turns-per-foot/
IEEE
Scientific Converters, "Convert Turns per Meter to Turns per Foot (TPM to TPF)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/yarn-twist/turns-per-meter-to-turns-per-foot/