The conversion of 70 kg to newtons is 686.7 newtons.
Table of Contents
This calculation is based on multiplying the mass in kilograms by Earth’s gravitational acceleration, which is approximately 9.81 m/s². So, 70 kg times 9.81 gives the force in newtons, representing the weight of an object with that mass on Earth.
Conversion Result and Explanation
70 kilograms equals 686.7 newtons because weight in newtons is obtained by multiplying the mass in kilograms by 9.81, the acceleration due to gravity on Earth. This means, under Earth’s gravity, an object with 70 kg mass experiences a force of about 686.7 newtons.
Conversion Tool
Result in newtons:
Conversion Formula
The formula to convert kilograms to newtons works by multiplying the mass in kg by Earth’s gravitational acceleration, which is approximately 9.81 m/s². This conversion reflects the force exerted by gravity on the object. For example, for 70 kg: 70 x 9.81 = 686.7 N.
This calculation works because weight is a force, and force equals mass times acceleration (F = m x a). Since gravity provides a constant acceleration of about 9.81 m/s², multiplying the mass by this value gives the weight in newtons.
Conversion Example
- Convert 50 kg to newtons:
- Multiply 50 by 9.81
- 50 x 9.81 = 490.5 N
- This is the weight of 50 kg mass under Earth’s gravity.
- Convert 80 kg to newtons:
- Multiply 80 by 9.81
- 80 x 9.81 = 784.8 N
- This force represents the weight of the object.
- Convert 100 kg to newtons:
- Multiply 100 by 9.81
- 100 x 9.81 = 981 N
- Weight of a 100 kg mass on Earth.
Conversion Chart
| kg | Newtons |
|---|---|
| 45.0 | 441.45 |
| 50.0 | 490.50 |
| 55.0 | 539.55 |
| 60.0 | 588.60 |
| 65.0 | 637.65 |
| 70.0 | 686.70 |
| 75.0 | 735.75 |
| 80.0 | 784.80 |
| 85.0 | 833.85 |
| 90.0 | 882.90 |
| 95.0 | 931.95 |
Use this chart to quickly find the weight in newtons for masses between 45 and 95 kg. To read, locate the kg value in the first column, then see the corresponding newtons in the second column.
Related Conversion Questions
- What is the weight in newtons of a 70 kg object on the Moon?
- How do I convert 70 kg to pounds-force?
- What is the gravitational acceleration used for converting kg to newtons?
- Can I use the same conversion for other planets?
- How does altitude affect the weight of 70 kg in newtons?
- What is the difference between mass and weight in these conversions?
- What is the weight in newtons of 70 kg in a different gravity field?
Conversion Definitions
kg
Kg, or kilogram, is a metric unit of mass measuring the amount of matter in an object, defined as the base unit in the International System of Units, and used globally for weight, mass, and scientific measurements.
newtons
Newtons are units of force that measure the push or pull on an object, calculated by multiplying mass by acceleration due to gravity, and used to describe weight or force exerted by gravity on objects with mass.
Conversion FAQs
Why does 70 kg equal 686.7 newtons?
This is because weight is the force exerted by gravity on a mass. Multiplying 70 kg by Earth’s gravity (9.81 m/s²) gives 686.7 newtons, representing how much force gravity applies to that mass on Earth’s surface.
Can I use this conversion for other planets?
No, because gravity varies across planets. For example, Mars has about 3.71 m/s² gravity, so you would multiply the mass by that instead of 9.81 to find the weight on Mars.
What happens if I change the mass in the conversion?
Changing the mass directly affects the result because the force (weight) is proportional to mass. More mass results in higher newtons, less mass results in lower force, following the same formula.
Is 1 kg always equal to 9.81 newtons?
Not exactly, because 9.81 N is the weight of 1 kg on Earth. The kilogram is a unit of mass, while newtons measure force. The 9.81 factor accounts for Earth’s gravity, which makes the weight of 1 kg approximately 9.81 N.