40 pounds
18.14 kgMass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass
Just how heavy is 40 pounds?
Everyday mass
40 lb
40 pounds
The quantity is exact as entered.
18.14 kgMass in kilograms
0 kg
Explorer 1
Explorer 1 was the first satellite launched by the United States, carrying scientific instruments to study Earth's radiation environment.
13.97 kgLaunch mass in kilograms
0 kg
Bar length measures mass, not physical size. Both bars start at zero kilograms (kg). Pictures identify the objects only.
A little perspective
40 pounds is about 1.3 times the launch mass of Explorer 1.
Measurements, assumptions & sources +
40 pounds
Mass: 18.14 kg; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Explorer 1
Launch mass: 13.97 kg; specified; range 13.9 kg–14.1 kg.
Explorer 1, the first US satellite, was about 2.03 m long and 14 kg including its instrumented cylindrical body. Antennas are contextual.
The marked launch mass is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 40 pounds with the launch mass of Explorer 1. The notes below explain how each value was chosen.
Explorer 1
13.97 kgLaunch mass · specified · range 13.9 kg–14.1 kg
Explorer 1, the first US satellite, was about 2.03 m long and 14 kg including its instrumented cylindrical body. Antennas are contextual.
- Comparing
- Mass ↔ Launch mass
- Relative size
- 40 pounds is about 1.3 times the launch mass of Explorer 1. 40 pounds is approximately 29.9% greater than the launch mass of Explorer 1.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- We use 13.97 kg for the launch mass of Explorer 1; the recorded range is 13.9 kg–14.1 kg.
Mass is distinct from weight: an object’s mass stays the same as gravity changes.
18.144 kgkilograms
0.018144 ttonnes
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.