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Angstroms to Picometers Converter
↔ Convert pm to Å instead

Common Conversions

Å pm
0.5 50
0.96 96
1 100
1.21 121
1.34 134
1.54 154
2 200
3 300
3.4 340
5 500
10 1000

Why this conversion matters in chemistry

Crystallography still runs on ångströms — the CIF files for small-molecule structures tabulate bond lengths in Å because the numbers are convenient (C–C at 1.54 Å, C=O at 1.23 Å, aromatic C–C at 1.40 Å). IUPAC has been pushing for picometers as the strict SI replacement, which keeps the same precision but uses whole-number values (154 pm, 123 pm, 140 pm). Multiplying by 100 does the conversion. Both units are accepted across the chemistry literature, and there's no real pressure for a universal switch. Being fluent both directions is what lets you read across older and newer structural papers without stumbling.

Formula

pm = Å × 100

Worked Examples

1 Å = 100 pm

The defining equivalence. An ångström is exactly a hundred picometers.

1.54 Å = 154 pm

A C–C single bond. The reference value most organic chemistry is calibrated against.

0.96 Å = 96 pm

The O–H bond length in water. Short even by molecular standards — oxygen pulls its hydrogen in tight.

3.4 Å = 340 pm

The spacing between stacked base pairs in B-form DNA. An iconic number in structural biology.

Frequently Asked Questions

How do I convert Å to pm?
Multiply by 100. So 1.54 Å becomes 154 pm, 0.96 Å becomes 96 pm. A decimal shift two places right — about as clean as a conversion gets.
Is the ångström an SI unit?
No, not strictly. The ångström is accepted for use alongside SI, but the formally recommended unit for atomic-scale distances is the picometer. Chemistry journals and crystallographic databases have mostly settled on allowing both — neither is going away soon.
Why do chemists still use ångströms?
Because the numbers fall into a comfortable range. Most bond lengths are 1–3 Å and most atomic radii 0.5–2.5 Å — both cases where a single-digit decimal reads more cleanly than a three-digit picometer value. The convention is durable mostly because no one has a strong reason to fight for switching.
What's 1 Å in other units?
Exactly 100 pm, 0.1 nm, or 10⁻¹⁰ m. The nanometer and picometer are both SI; the ångström isn't strictly, but all four describe the same atomic-scale distances at different granularities.