How do I convert a to fs?

Use the formula shown above or enter a value to see a converted to fs instantly.

What is the formula for a to fs?

The converter calculates fs by applying the category-specific conversion factor for Time.

a and fs are both part of the Time category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Time Conversion Reference

Use the live converter below to translate between Year (a) and Femtosecond (fs). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

Year

Femtosecond

3.15576×10^22

Rounded result (4 decimals max)

Formula

1 a = 3.15576×10^22 fs

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

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