Convert Metric Ton to Femtogram
Convert metric tons to femtograms instantly. 1 metric ton = 1e+21 femtogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Femtogram to Metric Ton converter for the reverse conversion.
Units explained
Metric Ton
The metric ton (t) equals exactly 1,000 kilograms; it is also called the tonne.
From 'tun', a large medieval cask; 'metric' distinguishes it from imperial tons.
The global standard for trade, freight, and heavy industry.
Recognized internationally with the spread of the metric system in the late 19th century.
Femtogram
A femtogram (fg) equals 10^-18 kilogram.
From the SI prefix 'femto-' (from Danish/Norwegian 'femten', fifteen).
Nanotechnology and high-sensitivity mass spectrometry.
The femto- prefix was adopted by the CGPM in 1975.
Metric Ton to Femtogram conversion formula
The relationship between metric tons and femtograms:
To convert metric tons to femtograms, multiply the value in metric tons by 1e+21. To reverse, multiply femtograms by 1e-21.
How to use this converter
Type a value into the calculator. The result in femtograms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Femtogram to Metric Ton converter for the reverse direction.
Step-by-step: convert metric tons to femtograms
- Write down the value in metric tons (t).
- Multiply that value by the factor 1e+21.
- The product is the equivalent value in femtograms (fg).
- To reverse, multiply the femtogram value by 1e-21.
Worked examples
Example 1 — Convert 1 t to fg:
1 × 1e+21 = 1e+21 fg
Example 2 — Convert 100 t to fg:
100 × 1e+21 = 1e+23 fg
Real-world example — Geographic to wavelength scale
One metric ton equals one trillion femtograms — illustrating the 12-order-of-magnitude span between geographic distance and atomic-feature scales.
1 t × 1e+21 = 1e+21 fg
Real-world example — Kilometres to wavelengths
One metric ton equals one trillion femtograms — a conversion physics teachers use to convey the gulf between everyday geographic and atomic scales.
1 t × 1e+21 = 1e+21 fg
Metric Ton to Femtogram conversion table
Standard reference values for converting metric tons to femtograms:
| Metric Ton [t] | Femtogram [fg] |
|---|---|
| 0.01 | 1e+19 |
| 0.1 | 1e+20 |
| 1 | 1e+21 |
| 2 | 2e+21 |
| 3 | 3e+21 |
| 4 | 4e+21 |
| 5 | 5e+21 |
| 10 | 1e+22 |
| 20 | 2e+22 |
| 30 | 3e+22 |
| 40 | 4e+22 |
| 50 | 5e+22 |
| 100 | 1e+23 |
| 500 | 5e+23 |
| 1000 | 1e+24 |
Frequently asked questions
How many femtograms is 1 metric ton?
How do I convert metric tons to femtograms?
How do I convert femtograms back to metric tons?
How many femtograms is 100 metric tons?
Popular weight unit conversions
Convert Metric Ton to other weight units
Show all Metric Ton conversions
Metric / SI (17 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 t = 1e+21 fg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.