📐 Fermis to Chains Converter

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1 fermi =
4.97097 × 10⁻¹⁷ chains
1 chain =
2.01168 × 10¹⁶ fermis
Formula
ch = fm × 4.97097 × 10⁻¹⁷
Handy values
100 fm = 4.97097 × 10⁻¹⁵ ch · 1,000 fm = 4.97097 × 10⁻¹⁴ ch · 10,000 fm = 4.97097 × 10⁻¹³ ch

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⚡ Fermis to Chains: the quick answer

1 fm = 4.97097 × 10⁻¹⁷ ch 1 fermi equals 4.97097 × 10⁻¹⁷ chains

To convert fermis to chains, multiply the value by 4.97097 × 10⁻¹⁷. To go the other way, multiply chains by 2.01168 × 10¹⁶ to get fermis.

↔ Convert chains to fermis instead

🧮 Formula

Fermis to Chains
ch = fm × 4.97097 × 10⁻¹⁷
Chains to Fermis
fm = ch × 2.01168 × 10¹⁶

Where

  • fm = the length in fermis
  • ch = the length in chains
Every unit here is defined by its length in meters, so the conversion factor is (meters per fermi) ÷ (meters per chain).

📊 Fermis to Chains conversion table

Fermis (fm)Chains (ch)
1 fm4.97097 × 10⁻¹⁷ ch
5 fm2.48548 × 10⁻¹⁶ ch
10 fm4.97097 × 10⁻¹⁶ ch
25 fm1.24274 × 10⁻¹⁵ ch
50 fm2.48548 × 10⁻¹⁵ ch
100 fm4.97097 × 10⁻¹⁵ ch
250 fm1.24274 × 10⁻¹⁴ ch
500 fm2.48548 × 10⁻¹⁴ ch
1,000 fm4.97097 × 10⁻¹⁴ ch
2,500 fm1.24274 × 10⁻¹³ ch
5,000 fm2.48548 × 10⁻¹³ ch
10,000 fm4.97097 × 10⁻¹³ ch
100,000 fm4.97097 × 10⁻¹² ch
1,000,000 fm4.97097 × 10⁻¹¹ ch

✏️ Worked examples

Convert 25 fermis to chains

25 fm × 4.97097 × 10⁻¹⁷ = 1.24274 × 10⁻¹⁵ ch

Try this example →

Convert 250 fermis to chains

250 fm × 4.97097 × 10⁻¹⁷ = 1.24274 × 10⁻¹⁴ ch

Try this example →

📘 About these units

Fermi (fm). A fermi (femtometer) is 10⁻¹⁵ meters, roughly the size of a proton, used in nuclear physics.

Chain (ch). A chain is 66 feet (20.1168 m), a surveying unit; 80 chains make one mile.

❓ Frequently asked questions

How many chains are in one fermi?

There are 4.97097 × 10⁻¹⁷ chains in one fermi.

How do I convert fermis to chains?

Multiply the number of fermis by 4.97097 × 10⁻¹⁷. For example, 10 fermis equal 4.97097 × 10⁻¹⁶ chains.

How many fermis are in one chain?

One chain equals 2.01168 × 10¹⁶ fermis.

How many chains is 1,000 fermis?

4.97097 × 10⁻¹⁴ chains. Other common values: 100 fermis = 4.97097 × 10⁻¹⁵ chains and 10,000 fermis = 4.97097 × 10⁻¹³ chains.

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