Weight and Mass Converter
Our Weight and Mass converter handles a vast range of units, from the tiniest atomic masses to the immense weight of Earth. Whether you need to convert between metric, imperial, or ancient Biblical units, this tool provides accurate results instantly. It supports over 20 units including grams, pounds, atomic mass units, and even the Earth's mass. Perfect for scientists, historians, and everyday users, it simplifies complex conversions with a user-friendly interface.
How It Works
Our converter uses precise conversion factors to transform any weight or mass value from one unit to another. Simply enter the amount, select the source unit, and choose the target unit. The tool instantly calculates the result using standardized formulas. For example, 1 kilogram equals 2.20462 pounds, and 1 atomic mass unit equals 1.660539e-27 grams. The tool handles both small and large numbers, ensuring accuracy for scientific and everyday use.
Common Units and Their Uses
Weight and mass units vary widely. Metric units like grams (g) and kilograms (kg) are standard in science and daily life. Imperial units such as pounds (lbs) and ounces (oz) are common in the US and UK. Ancient units like the bekan (Biblical Hebrew) and denarius (Biblical Roman) are used in historical studies. Atomic units like the dalton (Da) and Electron mass (m_e) are essential in physics and chemistry. The Earth's mass (M_earth) is used in astronomy.
Real-World Examples with Actual Numbers
Convert 5 kilograms to pounds: 5 kg × 2.20462 = 11.0231 lbs. Convert 100 grams to ounces: 100 g × 0.035274 = 3.5274 oz. For ancient units, 1 assarion (Biblical Roman) equals about 0.5 grams, so 10 assarion = 5 grams. In physics, 1 Deuteron mass (m_d) is approximately 3.34358e-27 kg, useful for nuclear calculations. For large scales, Earth's mass is 5.972e24 kg, which can be converted to exagrams (5.972e9 Eg).
Common Mistakes to Avoid
- Confusing mass and weight: Mass is constant, weight varies with gravity. Our converter uses mass units, but for everyday use on Earth, they are often interchangeable.
- Using wrong conversion factors: Always double-check, especially with ancient units. For example, 1 gerah (Biblical Hebrew) equals 0.57 grams, not 1 gram.
- Ignoring significant figures: For scientific work, use enough decimal places. Converting 1 attogram (ag) to grams gives 1e-18 g, which is accurate.
- Mixing unit systems: Ensure you convert within the same system or use the correct factor. For instance, 1 carat (car, ct) is 0.2 grams, not 0.2 ounces.
Everyday Uses
This converter is handy for cooking (grams to ounces), shipping (pounds to kilograms), and fitness (kilograms to pounds). Historians can convert ancient weights like didrachma (Biblical Greek) to modern units. Scientists use it for atomic masses and Earth's mass. For quick conversions, try our kg to lbs or lbs to kg tools. Also useful: g to oz and oz to g.
Frequently Asked Questions
How do I convert 10 grams to ounces using this converter?
Enter '10' in the value field, select 'gram' as the source unit, and choose 'ounce' as the target unit. The result will be 0.35274 ounces, as 1 gram equals 0.035274 ounces.
What is the difference between an atomic mass unit (u) and a dalton (Da)?
They are identical; both represent 1/12 the mass of a carbon-12 atom, approximately 1.660539e-27 kg. The dalton is more common in biochemistry, while atomic mass unit is used in physics.
Can I convert Earth's mass to kilograms?
Yes. Earth's mass is approximately 5.972e24 kg. Enter '1' in the value field, select 'Earth's mass' as the source, and choose 'kilogram' as the target to get the result.
How many grams are in one bekah (Biblical Hebrew)?
One bekah (Biblical Hebrew) equals about 5.7 grams. This unit was used in ancient Israel for weighing silver and other goods.
Why does my conversion from pounds to grams give a different result than expected?
Ensure you are using the correct conversion factor: 1 pound equals 453.592 grams. If you used a rounded factor like 454, the result will be slightly off. Our converter uses the exact value for accuracy.
Popular Weight and Mass Conversions
Complete List of Units for Conversion
- kilogram [kg] (Base Unit)
- assarion (Biblical Roman) [assarion] = 1 assarion (Biblical Roman) = 0.00024 kilogram (assarion (Biblical Roman) to kilogram, kilogram to assarion (Biblical Roman))
- Atomic mass unit [u] = 1 Atomic mass unit = 0.0 kilogram (Atomic mass unit to kilogram, kilogram to Atomic mass unit)
- attogram [ag] = 1 attogram = 0.0 kilogram (attogram to kilogram, kilogram to attogram)
- bekan (Biblical Hebrew) [bekan (BH)] = 1 bekan (Biblical Hebrew) = 0.005712 kilogram (bekan (Biblical Hebrew) to kilogram, kilogram to bekan (Biblical Hebrew))
- carat [car, ct] = 1 carat = 0.0002 kilogram (carat to kilogram, kilogram to carat)
- centigram [cg] = 1 centigram = 1e-05 kilogram (centigram to kilogram, kilogram to centigram)
- dalton [Da] = 1 dalton = 0.0 kilogram (dalton to kilogram, kilogram to dalton)
- decigram [dg] = 1 decigram = 0.0001 kilogram (decigram to kilogram, kilogram to decigram)
- dekagram [dag] = 1 dekagram = 0.01 kilogram (dekagram to kilogram, kilogram to dekagram)
- denarius (Biblical Roman) [denarius] = 1 denarius (Biblical Roman) = 0.00384 kilogram (denarius (Biblical Roman) to kilogram, kilogram to denarius (Biblical Roman))
- Deuteron mass [m_d] = 1 Deuteron mass = 0.0 kilogram (Deuteron mass to kilogram, kilogram to Deuteron mass)
- didrachma (Biblical Greek) [didrachma (BG)] = 1 didrachma (Biblical Greek) = 0.0068 kilogram (didrachma (Biblical Greek) to kilogram, kilogram to didrachma (Biblical Greek))
- drachma (Biblical Greek) [drachma (BG)] = 1 drachma (Biblical Greek) = 0.0034 kilogram (drachma (Biblical Greek) to kilogram, kilogram to drachma (Biblical Greek))
- Earth's mass [M_earth] = 1 Earth's mass = 5.972e+24 kilogram (Earth's mass to kilogram, kilogram to Earth's mass)
- Electron mass (rest) [m_e] = 1 Electron mass (rest) = 0.0 kilogram (Electron mass (rest) to kilogram, kilogram to Electron mass (rest))
- exagram [Eg] = 1 exagram = 1000000000000000.0 kilogram (exagram to kilogram, kilogram to exagram)
- femtogram [fg] = 1 femtogram = 0.0 kilogram (femtogram to kilogram, kilogram to femtogram)
- gamma [gamma] = 1 gamma = 0.0 kilogram (gamma to kilogram, kilogram to gamma)
- gerah (Biblical Hebrew) [gerah (BH)] = 1 gerah (Biblical Hebrew) = 0.000571 kilogram (gerah (Biblical Hebrew) to kilogram, kilogram to gerah (Biblical Hebrew))
- gigagram [Gg] = 1 gigagram = 1000000.0 kilogram (gigagram to kilogram, kilogram to gigagram)
- grain [gr] = 1 grain = 6.5e-05 kilogram (grain to kilogram, kilogram to grain)
- gram [g] = 1 gram = 0.001 kilogram (gram to kilogram, kilogram to gram)
- hectogram [hg] = 1 hectogram = 0.1 kilogram (hectogram to kilogram, kilogram to hectogram)
- hundredweight (UK) [cwt (UK)] = 1 hundredweight (UK) = 50.802345 kilogram (hundredweight (UK) to kilogram, kilogram to hundredweight (UK))
- hundredweight (US) [cwt (US)] = 1 hundredweight (US) = 45.359237 kilogram (hundredweight (US) to kilogram, kilogram to hundredweight (US))
- kilogram-force square second/meter [kgf·s²/m] = 1 kilogram-force square second/meter = 9.80665 kilogram (kilogram-force square second/meter to kilogram, kilogram to kilogram-force square second/meter)
- kilopound [kip] = 1 kilopound = 453.59237 kilogram (kilopound to kilogram, kilogram to kilopound)
- kiloton (metric) [kt] = 1 kiloton (metric) = 1000000.0 kilogram (kiloton (metric) to kilogram, kilogram to kiloton (metric))
- lepton (Biblical Roman) [lepton] = 1 lepton (Biblical Roman) = 3e-05 kilogram (lepton (Biblical Roman) to kilogram, kilogram to lepton (Biblical Roman))
- megagram [Mg] = 1 megagram = 1000.0 kilogram (megagram to kilogram, kilogram to megagram)
- microgram [µg] = 1 microgram = 0.0 kilogram (microgram to kilogram, kilogram to microgram)
- milligram [mg] = 1 milligram = 1e-06 kilogram (milligram to kilogram, kilogram to milligram)
- mina (Biblical Greek) [mina (BG)] = 1 mina (Biblical Greek) = 0.34 kilogram (mina (Biblical Greek) to kilogram, kilogram to mina (Biblical Greek))
- mina (Biblical Hebrew) [mina (BH)] = 1 mina (Biblical Hebrew) = 0.5712 kilogram (mina (Biblical Hebrew) to kilogram, kilogram to mina (Biblical Hebrew))
- Muon mass [m_mu] = 1 Muon mass = 0.0 kilogram (Muon mass to kilogram, kilogram to Muon mass)
- nanogram [ng] = 1 nanogram = 0.0 kilogram (nanogram to kilogram, kilogram to nanogram)
- Neutron mass [m_n] = 1 Neutron mass = 0.0 kilogram (Neutron mass to kilogram, kilogram to Neutron mass)
- ounce [oz] = 1 ounce = 0.02835 kilogram (ounce to kilogram, kilogram to ounce)
- pennyweight [pwt] = 1 pennyweight = 0.001555 kilogram (pennyweight to kilogram, kilogram to pennyweight)
- petagram [Pg] = 1 petagram = 1000000000000.0 kilogram (petagram to kilogram, kilogram to petagram)
- picogram [pg] = 1 picogram = 0.0 kilogram (picogram to kilogram, kilogram to picogram)
- Planck mass [m_P] = 1 Planck mass = 0.0 kilogram (Planck mass to kilogram, kilogram to Planck mass)
- pound [lbs] = 1 pound = 0.453592 kilogram (pound to kilogram, kilogram to pound)
- pound (troy or apothecary) [lb t] = 1 pound (troy or apothecary) = 0.373242 kilogram (pound (troy or apothecary) to kilogram, kilogram to pound (troy or apothecary))
- pound-force square second/foot [lbf·s²/ft] = 1 pound-force square second/foot = 14.593903 kilogram (pound-force square second/foot to kilogram, kilogram to pound-force square second/foot)
- poundal [pdl] = 1 poundal = 0.013825 kilogram (poundal to kilogram, kilogram to poundal)
- Proton mass [m_p] = 1 Proton mass = 0.0 kilogram (Proton mass to kilogram, kilogram to Proton mass)
- quadrans (Biblical Roman) [quadrans] = 1 quadrans (Biblical Roman) = 6e-05 kilogram (quadrans (Biblical Roman) to kilogram, kilogram to quadrans (Biblical Roman))
- quarter (UK) [qr (UK)] = 1 quarter (UK) = 12.700586 kilogram (quarter (UK) to kilogram, kilogram to quarter (UK))
- quarter (US) [qr (US)] = 1 quarter (US) = 11.339809 kilogram (quarter (US) to kilogram, kilogram to quarter (US))
- quintal (metric) [cwt] = 1 quintal (metric) = 100.0 kilogram (quintal (metric) to kilogram, kilogram to quintal (metric))
- scruple (apothecary) [s.ap] = 1 scruple (apothecary) = 0.001296 kilogram (scruple (apothecary) to kilogram, kilogram to scruple (apothecary))
- shekel (Biblical Hebrew) [shekel (BH)] = 1 shekel (Biblical Hebrew) = 0.011424 kilogram (shekel (Biblical Hebrew) to kilogram, kilogram to shekel (Biblical Hebrew))
- slug [slug] = 1 slug = 14.593903 kilogram (slug to kilogram, kilogram to slug)
- stone (UK) [st (UK)] = 1 stone (UK) = 6.350293 kilogram (stone (UK) to kilogram, kilogram to stone (UK))
- stone (US) [st (US)] = 1 stone (US) = 6.350293 kilogram (stone (US) to kilogram, kilogram to stone (US))
- Sun's mass [M_sun] = 1 Sun's mass = 1.989e+30 kilogram (Sun's mass to kilogram, kilogram to Sun's mass)
- talent (Biblical Greek) [talent (BG)] = 1 talent (Biblical Greek) = 20.4 kilogram (talent (Biblical Greek) to kilogram, kilogram to talent (Biblical Greek))
- talent (Biblical Hebrew) [talent (BH)] = 1 talent (Biblical Hebrew) = 34.272 kilogram (talent (Biblical Hebrew) to kilogram, kilogram to talent (Biblical Hebrew))
- teragram [Tg] = 1 teragram = 1000000000.0 kilogram (teragram to kilogram, kilogram to teragram)
- tetradrachma (Biblical Greek) [tetradrachma (BG)] = 1 tetradrachma (Biblical Greek) = 0.0136 kilogram (tetradrachma (Biblical Greek) to kilogram, kilogram to tetradrachma (Biblical Greek))
- ton (assay) (UK) [AT (UK)] = 1 ton (assay) (UK) = 0.032667 kilogram (ton (assay) (UK) to kilogram, kilogram to ton (assay) (UK))
- ton (assay) (US) [AT (US)] = 1 ton (assay) (US) = 0.029167 kilogram (ton (assay) (US) to kilogram, kilogram to ton (assay) (US))
- ton (long) [ton (UK)] = 1 ton (long) = 1016.046909 kilogram (ton (long) to kilogram, kilogram to ton (long))
- ton (metric) [t] = 1 ton (metric) = 1000.0 kilogram (ton (metric) to kilogram, kilogram to ton (metric))
- ton (short) [ton (US)] = 1 ton (short) = 907.18474 kilogram (ton (short) to kilogram, kilogram to ton (short))
- tonne [t] = 1 tonne = 1000.0 kilogram (tonne to kilogram, kilogram to tonne)