# When my calculator says 1E15 (but the E is smaller), what does that mean?

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• The “E” means “times 10 to the power of”. So in this case, your example would mean: 1.0 x 10^15.

Source(s): Chemistry Teacher
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• 1e 15

Source(s): poopy land
• your calculator is showing what the exponent is on a x 10^x

ie 1E15 is 1×10^15 or 2.5E7 is 2.5×10^7.

• scientific notation

1.0 times 10 to the 15 power

1,000,000,000,000,000

• 1×10^15, eg 1 followed by 15 zeroes.

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