Convert Dynes to Poundals

To convert dynes to poundals, use newtons (N) as the bridge unit.

• Dyne (dyn) is a CGS force unit: 1 dyn = 1 × 10⁻⁵ N
• Poundal (pdl) is an FPS force unit: 1 pdl = 0.138255 N (approx)

Dyne to poundal conversion formula

• pdl = dyn × (1 × 10⁻⁵ / 0.138255)
• pdl = dyn × 7.233 × 10⁻⁵ (approx)

Quick example

• 50,000 dyn × 7.233 × 10⁻⁵ = 3.6165 pdl (approx)

Tip: For the reverse direction, 1 pdl ≈ 13,825.5 dyn.

What is a dyne (dyn)?

A dyne is a unit of force in the CGS system (centimeter-gram-second). It’s the force needed to accelerate 1 gram by 1 centimeter per second squared. Dynes often show up in older physics texts and lab work.

What is a poundal (pdl)?

A poundal is a unit of force in the FPS system (foot-pound-second). It’s the force needed to accelerate 1 pound-mass by 1 foot per second squared. Poundals may appear in classic mechanics problems and some engineering notes.

What’s the conversion factor from dynes to poundals?

Use this fixed conversion:

• 1 dyne = 7.233013851 × 10^-6 poundals
• 1 poundal = 138,255.0 dynes (about)

These values come from the exact relationships between newtons, dynes, and poundals.

How do I convert dynes to poundals?

Multiply dynes by 7.233013851 × 10^-6.

Formula:
pdl = dyn × 7.233013851 × 10^-6

Example:
50,000 dyn = 50,000 × 0.000007233013851 = 0.3616506926 pdl

How do I convert poundals to dynes?

Multiply poundals by 138,255 (about).

Formula:
dyn = pdl × 138,255

Example:
2 pdl = 2 × 138,255 = 276,510 dyn

Why is the dyne so much smaller than the poundal?

They come from different base units. The dyne uses grams and centimeters, which are small. The poundal uses pounds and feet, which are larger. That’s why you need many dynes to equal one poundal.

How can I convert dynes to poundals using newtons as a bridge?

You can convert through newtons if you already have those values.

• 1 dyne = 1 × 10^-5 N
• 1 poundal = 0.138254954376 N

So:

• pdl = (dyn × 10^-5) / 0.138254954376

This matches the direct factor of 7.233013851 × 10^-6.

Are dynes and poundals units of force or mass?

Both are units of force.
They are tied to mass through Newton’s second law (F = m·a), but the units themselves measure force, not mass.

Where are dynes and poundals used?

Dynes are common in CGS-based work, older references, and some lab contexts. Poundals show up in older FPS-based mechanics problems. Most modern work uses newtons (SI), but conversions still matter for legacy data.

What’s a quick way to estimate dynes to poundals?

For a fast estimate:

• pdl ≈ dyn ÷ 138,000

It won’t be exact, but it’s close enough for rough checks.

What common mistakes happen when converting dynes to poundals?

• Mixing pound-force (lbf) with poundal (pdl). They are not the same.
• Dropping the 10^-6 factor and getting answers that are too large.
• Confusing CGS and FPS base units when rewriting formulas.

How many significant digits should I keep in a dyne to poundal conversion?

Match your input precision. If your force is measured to 3 significant figures, keep about 3 in the result. Extra digits can look precise but don’t add real accuracy.

Can I convert dynes to poundals for very large numbers?

Yes. Large dyne values often convert to modest poundal values because the dyne is small. Scientific notation helps:

• 1.2 × 10^9 dyn = (1.2 × 10^9) × 7.233013851 × 10^-6 = 8,679.61662 pdl