Mass and Weight · Unit Converter

Convert Picogram to Ton (assay) (US)

Convert picograms to tons (assay) (us) instantly. 1 picogram = 3.428571e-14 ton (assay) (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ton (assay) (US) to Picogram 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 June 10, 2026 Last reviewed June 10, 2026 Updated June 10, 2026

Units explained

Metric / SI

Picogram

What is a picogram?

A picogram (pg) equals 10^-15 kilogram.

Origin of the picogram

From the SI prefix 'pico-' (from Spanish 'pico', a small quantity).

Where it is used

Single-cell biology and ultratrace chemical analysis.

When and where it was developed

The pico- prefix entered the SI in 1960.

Force / Engineering

Ton (assay) (US)

What is a ton (assay) (us)?

The assay ton (US) equals about 29.167 grams, a mining-assay convenience unit.

Origin of the ton (assay) (us)

Devised so an assay sample's metal in milligrams reads as troy ounces per short ton.

Where it is used

Ore assaying and metallurgy.

When and where it was developed

Adopted in assay laboratories to simplify ore-grade calculation.

Picogram to Ton (assay) (US) conversion formula

The relationship between picograms and tons (assay) (us):

1 pg = 3.428571e-14 AT

1 AT = 2.916667e+13 pg

To convert picograms to tons (assay) (us), multiply the value in picograms by 3.428571e-14. To reverse, multiply tons (assay) (us) by 2.916667e+13.

How to use this converter

Type a value into the calculator. The result in tons (assay) (us) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Ton (assay) (US) to Picogram converter for the reverse direction.

Step-by-step: convert picograms to tons (assay) (us)

Write down the value in picograms (pg).
Multiply that value by the factor 3.428571e-14.
The product is the equivalent value in tons (assay) (us) (AT).
To reverse, multiply the ton (assay) (us) value by 2.916667e+13.

Worked examples

Example 1 — Convert 1 pg to AT:
1 × 3.428571e-14 = 3.428571e-14 AT

Example 2 — Convert 100 pg to AT:
100 × 3.428571e-14 = 3.428571e-12 AT

Real-world example — Sub-micron to millimeter

500,000 picograms converts to a small everyday quantity in tons (assay) (us) — useful when relating optical-wavelength specifications to physical mounting hardware.

500000 pg × 3.428571e-14 = 1.714286e-8 AT

Real-world example — From wavelengths to millimeter-scale objects

A value of one million picograms sounds vast at the atomic scale but converts to a small everyday quantity in tons (assay) (us) — useful when relating optical-wavelength specifications to physical mounting hardware.

1000000 pg × 3.428571e-14 = 3.428571e-8 AT

Picogram to Ton (assay) (US) conversion table

Standard reference values for converting picograms to tons (assay) (us):

Picogram [pg]	Ton (assay) (US) [AT]
0.01	3.428571e-16
0.1	3.428571e-15
1	3.428571e-14
2	6.857142e-14
3	1.028571e-13
4	1.371428e-13
5	1.714286e-13
10	3.428571e-13
20	6.857142e-13
30	1.028571e-12
40	1.371428e-12
50	1.714286e-12
100	3.428571e-12
500	1.714286e-11
1000	3.428571e-11

Frequently asked questions

How many tons (assay) (us) is 1 picogram?

1 picogram equals 3.428571e-14 ton (assay) (us).

How do I convert picograms to tons (assay) (us)?

Multiply the value in picograms by 3.428571e-14 to get tons (assay) (us).

How do I convert tons (assay) (us) back to picograms?

Multiply the value in tons (assay) (us) by 2.916667e+13, or use the Ton (assay) (US) to Picogram converter.

How many tons (assay) (us) is 100 picograms?

100 picograms equals 3.428571e-12 tons (assay) (us), because 100 × 3.428571e-14 = 3.428571e-12.

Convert Picogram to other weight units

Show all Picogram conversions

Metric / SI (17 units)

Picogram to Attogram (ag) Picogram to Femtogram (fg) Picogram to Nanogram (ng) Picogram to Microgram (µg) Picogram to Milligram (mg) Picogram to Centigram (cg) Picogram to Decigram (dg) Picogram to Gram (g) Picogram to Dekagram (dag) Picogram to Hectogram (hg) Picogram to Kilogram (kg) Picogram to Quintal (metric) (q) Picogram to Metric Ton (t) Picogram to Gigagram (Gg) Picogram to Teragram (Tg) Picogram to Petagram (Pg) Picogram to Exagram (Eg)

Avoirdupois (15 units)

Picogram to Grain (gr) Picogram to Dram (avoirdupois) (dr) Picogram to Ounce (oz) Picogram to Pound (lb) Picogram to Clove (clove) Picogram to Stone (US) (st) Picogram to Stone (UK) (st) Picogram to Quarter (US) (qr) Picogram to Quarter (UK) (qr) Picogram to Hundredweight (US) (cwt) Picogram to Hundredweight (UK) (cwt) Picogram to Wey (wey) Picogram to Kilopound (kip) (kip) Picogram to Ton (short, US) (sh tn) Picogram to Ton (long, UK) (long tn)

Troy & Apothecary (10 units)

Picogram to Point (1/100 carat) (pt) Picogram to Carat (metric) (ct) Picogram to Scruple (apothecary) (s ap) Picogram to Pennyweight (dwt) Picogram to Momme (mom) Picogram to Mace (mace) Picogram to Dram (apothecary/troy) (dr ap) Picogram to Troy Ounce (oz t) Picogram to Tael (tael) Picogram to Pound (troy/apothecary) (lb t)

Indian / South Asian (6 units)

Picogram to Ratti (ratti) Picogram to Masha (masha) Picogram to Tola (tola) Picogram to Chittack (Chatank) (chittack) Picogram to Seer (Ser) (seer) Picogram to Maund (Mann) (maund)

Scientific / Atomic (9 units)

Picogram to Electron Mass (rest) (me) Picogram to MeV/c2 (MeV/c²) Picogram to Muon Mass (mµ) Picogram to Atomic Mass Unit (u) Picogram to Proton Mass (mp) Picogram to Neutron Mass (mn) Picogram to Deuteron Mass (md) Picogram to Carbon-12 Atom Mass (C-12) Picogram to Planck Mass (mP)

Astronomical (4 units)

Picogram to Lunar Mass (Moon) (M☾) Picogram to Earth's Mass (M⊕) Picogram to Jupiter Mass (MJ) Picogram to Sun's Mass (M☉)

Biblical / Ancient (14 units)

Picogram to Lepton (Biblical Roman) (lepton) Picogram to Quadrans (Biblical Roman) (quadrans) Picogram to Assarion (Biblical Roman) (assarion) Picogram to Gerah (Biblical Hebrew) (gerah) Picogram to Drachma (Biblical Greek) (drachma) Picogram to Denarius (Biblical Roman) (denarius) Picogram to Bekan (Biblical Hebrew) (bekah) Picogram to Didrachma (Biblical Greek) (didrachma) Picogram to Shekel (Biblical Hebrew) (shekel) Picogram to Tetradrachma (Biblical Greek) (tetra) Picogram to Mina (Biblical Greek) (mina) Picogram to Mina (Biblical Hebrew) (mina) Picogram to Talent (Biblical Greek) (talent) Picogram to Talent (Biblical Hebrew) (talent)

Force / Engineering (5 units)

Picogram to Poundal (pdl) Picogram to Ton (assay) (US) (AT) Picogram to Ton (assay) (UK) (AT) Picogram to Kilogram-force square second/meter (hyl) Picogram to Slug (slug)

Sources & references

Conversion factor (1 pg = 3.428571e-14 AT) 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.

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