Mass and Weight · Unit Converter

Convert Tola to Femtogram

Convert tolas to femtograms instantly. 1 tola = 1.16638e+16 femtogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Femtogram to Tola converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.
Mass and Weight category 2 min read Published Last reviewed Updated

Units explained

Indian / South Asian

Tola

What is a tola?

The tola equals 180 troy grains, about 11.6638 grams (three-eighths of a troy ounce).

Origin of the tola

From Sanskrit 'tula', meaning a balance or weighing.

Where it is used

The primary unit for gold and silver across India, Pakistan, and Nepal.

When and where it was developed

Fixed at 180 grains under British India in 1833.

Metric / SI

Femtogram

What is a femtogram?

A femtogram (fg) equals 10^-18 kilogram.

Origin of the femtogram

From the SI prefix 'femto-' (from Danish/Norwegian 'femten', fifteen).

Where it is used

Nanotechnology and high-sensitivity mass spectrometry.

When and where it was developed

The femto- prefix was adopted by the CGPM in 1975.

Tola to Femtogram conversion formula

Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.

The relationship between tolas and femtograms:

1 tola = 1.16638e+16 fg
1 fg = 8.573532e-17 tola

To convert tolas to femtograms, multiply the value in tolas by 1.16638e+16. To reverse, multiply femtograms by 8.573532e-17.

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 Tola converter for the reverse direction.

Step-by-step: convert tolas to femtograms

  1. Write down the value in tolas (tola).
  2. Multiply that value by the factor 1.16638e+16.
  3. The product is the equivalent value in femtograms (fg).
  4. To reverse, multiply the femtogram value by 8.573532e-17.

Worked examples

Example 1 — Convert 1 tola to fg:
1 × 1.16638e+16 = 1.16638e+16 fg

Example 2 — Convert 100 tola to fg:
100 × 1.16638e+16 = 1.16638e+18 fg

Real-world example — Small-scale to atomic-scale

One tola equals 10 million femtograms — useful for physics curricula that relate everyday measurements to atomic and optical scales.

1 tola × 1.16638e+16 = 1.16638e+16 fg

Real-world example — Centimeter to wavelength scale

One tola equals 10 million femtograms. Physics curricula use this kind of conversion to relate everyday measurements to atomic and optical scales.

1 tola × 1.16638e+16 = 1.16638e+16 fg

Tola to Femtogram conversion table

Standard reference values for converting tolas to femtograms:

Tola [tola]Femtogram [fg]
0.011.16638e+14
0.11.16638e+15
11.16638e+16
22.332761e+16
33.499141e+16
44.665522e+16
55.831902e+16
101.16638e+17
202.332761e+17
303.499141e+17
404.665522e+17
505.831902e+17
1001.16638e+18
5005.831902e+18
10001.16638e+19

Frequently asked questions

How many femtograms is 1 tola?
1 tola equals 1.16638e+16 femtogram.
How do I convert tolas to femtograms?
Multiply the value in tolas by 1.16638e+16 to get femtograms.
How do I convert femtograms back to tolas?
Multiply the value in femtograms by 8.573532e-17, or use the Femtogram to Tola converter.
How many femtograms is 100 tolas?
100 tolas equals 1.16638e+18 femtograms, because 100 × 1.16638e+16 = 1.16638e+18.

Convert Tola to other weight units

Show all Tola conversions
Metric / SI (18 units)
Tola to Attogram (ag) Tola to Femtogram (fg) Tola to Picogram (pg) Tola to Nanogram (ng) Tola to Microgram (µg) Tola to Milligram (mg) Tola to Centigram (cg) Tola to Decigram (dg) Tola to Gram (g) Tola to Dekagram (dag) Tola to Hectogram (hg) Tola to Kilogram (kg) Tola to Quintal (metric) (q) Tola to Metric Ton (t) Tola to Gigagram (Gg) Tola to Teragram (Tg) Tola to Petagram (Pg) Tola to Exagram (Eg)
Avoirdupois (15 units)
Tola to Grain (gr) Tola to Dram (avoirdupois) (dr) Tola to Ounce (oz) Tola to Pound (lb) Tola to Clove (clove) Tola to Stone (US) (st) Tola to Stone (UK) (st) Tola to Quarter (US) (qr) Tola to Quarter (UK) (qr) Tola to Hundredweight (US) (cwt) Tola to Hundredweight (UK) (cwt) Tola to Wey (wey) Tola to Kilopound (kip) (kip) Tola to Ton (short, US) (sh tn) Tola to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Tola to Point (1/100 carat) (pt) Tola to Carat (metric) (ct) Tola to Scruple (apothecary) (s ap) Tola to Pennyweight (dwt) Tola to Momme (mom) Tola to Mace (mace) Tola to Dram (apothecary/troy) (dr ap) Tola to Troy Ounce (oz t) Tola to Tael (tael) Tola to Pound (troy/apothecary) (lb t)
Indian / South Asian (5 units)
Tola to Ratti (ratti) Tola to Masha (masha) Tola to Chittack (Chatank) (chittack) Tola to Seer (Ser) (seer) Tola to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Tola to Electron Mass (rest) (me) Tola to MeV/c2 (MeV/c²) Tola to Muon Mass (mµ) Tola to Atomic Mass Unit (u) Tola to Proton Mass (mp) Tola to Neutron Mass (mn) Tola to Deuteron Mass (md) Tola to Carbon-12 Atom Mass (C-12) Tola to Planck Mass (mP)
Astronomical (4 units)
Tola to Lunar Mass (Moon) (M☾) Tola to Earth's Mass (M⊕) Tola to Jupiter Mass (MJ) Tola to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Tola to Lepton (Biblical Roman) (lepton) Tola to Quadrans (Biblical Roman) (quadrans) Tola to Assarion (Biblical Roman) (assarion) Tola to Gerah (Biblical Hebrew) (gerah) Tola to Drachma (Biblical Greek) (drachma) Tola to Denarius (Biblical Roman) (denarius) Tola to Bekan (Biblical Hebrew) (bekah) Tola to Didrachma (Biblical Greek) (didrachma) Tola to Shekel (Biblical Hebrew) (shekel) Tola to Tetradrachma (Biblical Greek) (tetra) Tola to Mina (Biblical Greek) (mina) Tola to Mina (Biblical Hebrew) (mina) Tola to Talent (Biblical Greek) (talent) Tola to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Tola to Poundal (pdl) Tola to Ton (assay) (US) (AT) Tola to Ton (assay) (UK) (AT) Tola to Kilogram-force square second/meter (hyl) Tola to Slug (slug)

Sources & references

Conversion factor (1 tola = 1.16638e+16 fg) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.