Convert Kilogram to Pennyweight
Convert kilograms to pennyweights instantly. 1 kilogram = 643.0149479113 pennyweight — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pennyweight to Kilogram converter for the reverse conversion.
Units explained
Kilogram
The kilogram (kg) is the SI base unit of mass, defined by fixing the Planck constant h at 6.62607015E-34 J s.
From Greek 'khilioi' (thousand) plus 'gramma' (small weight).
The worldwide base unit of mass in science, commerce, and everyday life.
Adopted in 1795; redefined through the Planck constant on 20 May 2019.
Pennyweight
The pennyweight (dwt) equals one-twentieth of a troy ounce, 24 grains (about 1.555 g).
From the mass of a medieval English silver penny; symbol dwt from 'denarius weight'.
Jewelry making and precious-metal scrap valuation in the US.
Derived from the medieval English coinage system.
Kilogram to Pennyweight conversion formula
The relationship between kilograms and pennyweights:
To convert kilograms to pennyweights, multiply the value in kilograms by 643.0149479113. To reverse, multiply pennyweights by 0.0015551738.
How to use this converter
Type a value into the calculator. The result in pennyweights updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pennyweight to Kilogram converter for the reverse direction.
Step-by-step: convert kilograms to pennyweights
- Write down the value in kilograms (kg).
- Multiply that value by the factor 643.0149479113.
- The product is the equivalent value in pennyweights (dwt).
- To reverse, multiply the pennyweight value by 0.0015551738.
Worked examples
Example 1 — Convert 1 kg to dwt:
1 × 643.0149479113 = 643.0149479113 dwt
Example 2 — Convert 100 kg to dwt:
100 × 643.0149479113 = 64301.4947911288 dwt
Real-world example — Pet and accessory dimensions
A 3-kilogram dog leash equals a tidy round value in pennyweights. Pet-supply shopping frequently mixes the two units across product specifications.
3 kg × 643.0149479113 = 1929.0448437339 dwt
Real-world example — Fabric and tailoring
One kilogram of fabric converts to a value in pennyweights commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 kg × 643.0149479113 = 643.0149479113 dwt
Real-world example — Body height conversion (reverse direction)
You measure 1.75 kilograms tall and need to fill in a gym membership form or medical record that asks for height in pennyweights. This is the most-used everyday length conversion in metric-using countries.
1.75 kg × 643.0149479113 = 1125.2761588448 dwt
Kilogram to Pennyweight conversion table
Standard reference values for converting kilograms to pennyweights:
| Kilogram [kg] | Pennyweight [dwt] |
|---|---|
| 0.01 | 6.4301494791 |
| 0.1 | 64.3014947911 |
| 1 | 643.0149479113 |
| 2 | 1286.0298958226 |
| 3 | 1929.0448437339 |
| 4 | 2572.0597916452 |
| 5 | 3215.0747395564 |
| 10 | 6430.1494791129 |
| 20 | 12860.2989582258 |
| 30 | 19290.4484373386 |
| 40 | 25720.5979164515 |
| 50 | 32150.7473955644 |
| 100 | 64301.4947911288 |
| 500 | 321507.4739556441 |
| 1000 | 643014.9479112881 |
Frequently asked questions
How many pennyweights is 1 kilogram?
How do I convert kilograms to pennyweights?
How do I convert pennyweights back to kilograms?
How many pennyweights is 100 kilograms?
Popular weight unit conversions
Convert Kilogram to other weight units
Show all Kilogram 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 kg = 643.0149479113 dwt) 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.