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Poundals to Kilograms-force Converter

Convert poundals to kilograms-force — 1 pdl ≈ 0.014098 kgf. Bidirectional FPS-absolute to metric-gravitational force converter with formula and dynamics reference.

pdl

Kilograms-force

0.3243

kgf

23 pdl = 0.3243 kgf

kgf = pdl × 0.0140981

Poundals to Kilograms-force: 1 pdl equals 0.014098 kgf. To convert poundals to kilograms-force, multiply by 0.014098 (kgf = pdl × 0.0140981). For example, 10 pdl = 0.140981 kgf.

How to Convert Poundals to Kilograms-force

To convert from poundals to kilograms-force, multiply the value by 0.014098. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Poundals to Kilograms-force: kgf = pdl × 0.0140981
  • Kilograms-force to Poundals: pdl = kgf ÷ 0.0140981

Poundals to Kilograms-force Conversion Chart

Poundals (pdl)Kilograms-force (kgf)
0.10.00141
0.250.003525
0.50.007049
10.014098
20.028196
30.042294
50.07049
100.140981
200.281962
250.352452
500.704904
1001.409809
2503.524522
100014.098087

Understanding the Units

What is a Poundal?

A poundal equals approximately 0.138255 newtons — the force needed to accelerate one pound-mass by one foot per second squared.

Common contexts: absolute foot-pound-second system.

What is a Kilograms-force?

A kilogram-force equals exactly 9.80665 newtons — the gravitational force on a one-kilogram mass at standard gravity.

Common contexts: legacy engineering, tire pressure (kgf/cm²).

How to Convert Poundals to Kilograms-force

Multiply the poundal value by 0.0140981. The factor comes from 1 pdl = 0.138254954376 N divided by 1 kgf = 9.80665 N. The conversion crosses two unit systems and two philosophies — FPS absolute force to metric gravitational force.

Conversion Formula

  • Poundals to Kilograms-force: kgf = pdl × 0.0140981
  • Kilograms-force to Poundals: pdl = kgf × 70.9316
  • Mental shortcut: 1 kgf ≈ 71 pdl

Common Conversions

Poundals (pdl)Kilograms-force (kgf)Real-World Anchor
10.01411 pdl — small spring deflection
50.07055 pdl — light hand grip
100.141010 pdl — pencil-press feel
200.282020 pdl — small magnet
32.1740.453632.174 pdl = 1 lbf — pint glass
500.704950 pdl — moderate test load
70.931.000070.93 pdl = 1 kgf — kg-mass weight
1001.4098100 pdl — textbook benchmark
2503.5246250 pdl — laboratory test setup
5007.0492500 pdl — heavier dynamics demo
709.3210.000709 pdl = 10 kgf — bicycle-tire contact
1,00014.09811,000 pdl — large textbook problem
3,217.445.3593,217 pdl = 100 lbf — adult weight
5,00070.49045,000 pdl — engineering test rig

Understanding the Units

What Is a Poundal?

The poundal (pdl) is the absolute FPS unit of force: the force that accelerates one pound of mass at one foot per second squared. Exactly 1 pdl = 0.138254954376 N. Designed in 1879 as the F=ma-coherent imperial alternative to the gravitational pound-force.

What Is a Kilogram-force?

The kilogram-force (kgf, also kilopond, kp) is the gravitational metric unit of force equal to the weight of one kilogram-mass at standard gravity. Exactly 1 kgf = 9.80665 N. Long the everyday force unit in continental European engineering, replaced by the SI newton in the 1970s for new specifications but still appearing in legacy tables.

Cross-System Force Conversion

This conversion bridges two pre-SI worldviews: F=ma absolute imperial (poundal) and gravitational metric (kgf). The 1:71 ratio reflects both the pound-to-kilogram mass gap and the foot-per-second-squared-to-standard-gravity acceleration gap.

Historical Engineering Context

Early-20th-century British dynamics texts used poundals; continental European engineering used kilograms-force. The pdl-to-kgf conversion appears in technical references that bridged English-language theoretical dynamics with European industrial practice. Both have since been displaced by the SI newton, but the conversion survives in legacy documentation and history-of-engineering courses.

Related Force Converters

Brief History

The kilogram-force traces to 1901, when the third CGPM formalised standard gravity at 9.80665 m/s² — enabling the kgf to serve as a precise gravitational metric force unit. The poundal had been introduced earlier (1879). Both flourished through the early-to-mid 20th century before SI standardisation in 1960 and the gradual adoption of the coherent newton displaced them across engineering and scientific practice.

Related

Newtons to Pound-Force Converter

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Pound-Force to Newtons Converter

Convert pound-force to newtons — 1 lbf = 4.4482 N. Bidirectional imperial-to-SI force converter with formula, common values, and engineering load reference.

Kilonewtons to Newtons Converter

Convert kilonewtons to newtons — 1 kN = 1,000 N. Bidirectional SI force converter with formula, real-world load references (carabiners, bridges, aircraft thrust), and structural engineering context.

Newtons to Dynes Converter

Convert newtons to dynes — 1 N = 100,000 dyn. Bidirectional SI-to-CGS force converter with formula, surface-tension reference, and historical CGS context.

Kilogram-Force to Newtons Converter

Convert kilogram-force to newtons — 1 kgf = 9.80665 N. Mass vs force guide, practical reference values, and engineering context.

Dynes to Newtons

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FAQ

How many kilograms-force are in one poundal?

One poundal equals approximately 0.0140981 kilograms-force. The factor is 0.138254954376 N ÷ 9.80665 N/kgf.

What is the formula for converting poundals to kilograms-force?

Multiply by 0.0140981. So kgf = pdl × 0.0140981. For example, 3.7 pdl × 0.0140981 ≈ 0.0522 kgf — about 52 grams of weight at sea level.

How do I convert kilograms-force back to poundals?

Divide by 0.0140981 (or multiply by 70.9316). For example, 1 kgf × 70.9316 ≈ 70.93 pdl — equivalent to a typical adult-hand pinch-force value.

What is a poundal?

The poundal (pdl) is the absolute FPS (foot-pound-second) unit of force: the force needed to accelerate one pound of mass at one foot per second squared. 1 pdl = 1 lb·ft/s² = 0.138254954376 N exactly.

What is a kilogram-force?

The kilogram-force (kgf, or kilopond) is the gravitational metric unit of force equal to the weight of one kilogram at standard gravity. 1 kgf = 9.80665 N exactly. It was widely used in 20th-century European engineering before SI adopted the coherent newton.

Is the conversion exact?

Yes. The international pound (0.45359237 kg exact), the foot (0.3048 m exact), and standard gravity (9.80665 m/s² exact) are all defined exactly, so the underlying ratio is exact. The displayed decimal is rounded.

When would I encounter this conversion?

In dynamics textbooks that pair imperial absolute force (poundal) with continental European gravitational practice (kgf). It also appears in historical engineering tables bridging early-20th-century British FPS work and European industrial weight specifications.

Why are both units obsolete?

Both have been displaced by the SI newton. The poundal lost ground because most U.S. and UK engineering preferred pound-force; kgf lost ground because SI standardisation in the 1960s mandated coherent F=ma units. Conversions to and from them appear mainly in legacy documentation.

How many kilograms-force are in 1 poundal?

1 pdl equals 0.014098 kgf.

How do you convert poundals to kilograms-force?

Multiply the poundal value by 0.014098. Formula: kgf = pdl × 0.0140981.

How many kilograms-force are in 5 poundals?

5 pdl = 0.07049 kgf.

How do you convert kilograms-force back to poundals?

Use the inverse formula: pdl = kgf ÷ 0.0140981. For example, 1 kgf = 70.931609 pdl.

What is the difference between Poundal and Kilograms-force?

A poundal equals approximately 0.138255 newtons — the force needed to accelerate one pound-mass by one foot per second squared. A kilogram-force equals exactly 9.80665 newtons — the gravitational force on a one-kilogram mass at standard gravity.