Quadrillions to Millions (quad to M)
1 quadrillion equals 1,000,000,000 millions exactly.
How to convert quadrillions to millions
To convert quadrillions to millions, multiply the number of quadrillions by 1,000,000,000. This factor is exact. To go the other way, multiply millions by 1×10⁻⁹.
millions = quadrillions × 1,000,000,000
Example: 10 quadrillions = 10,000,000,000 millions.
Large-number names differ around the world: this site uses the short scale (billion = 10⁹) by default, and lists the long-scale billion separately.
About these units
Quadrillion (quad)
10¹⁵ in the short scale.
Quadrillion is 10¹⁵, a thousand trillion, on the short scale, and it is a number most people meet only through energy statistics. The U.S. Energy Information Administration defines a quad as a quadrillion British thermal units and notes that national energy use typically reaches quadrillions of Btu. Its examples include 35.43 quads from petroleum, 33.61 from natural gas, and 8.17 from coal.
The name uses the Latin quadri-, four. It appears among the terms in Nicolas Chuquet's unpublished manuscript of 1484, alongside byllion and tryllion. On the long scale the same 10¹⁵ is called a billiard, and a quadrillion means 10²⁴. The SI prefix for 10¹⁵ is peta-. A quadrillion seconds is about 31.7 million years.
1 quadrillion = 1×10¹⁵ pieces (exactly).
Sources: U.S. EIA: British thermal units (Btu); Wikipedia: Names of large numbers; BIPM SI Brochure, 9th edition (2019)
Million (M)
One million (10⁶).
Million comes from Italian. Old Italian milione was built from mille, a thousand, plus an augmentative ending, so it began as something like a big thousand. The name proved useful as a stem: by 1475 the French mathematician Jehan Adam was already building larger names from it, bymillion and trimillion, for 10¹² and 10¹⁸. The short and long scales agree on the million itself, 1,000,000 or 10⁶, and diverge only for the larger names. The SI prefix mega- stands for 10⁶.
Millions are hard to feel. Counting out a million items one by one is famously laborious, yet a million seconds lasts only about 11.57 days. A billion seconds, by contrast, is roughly 31.7 years.
1 million = 1,000,000 pieces (exactly).
Sources: Wikipedia: Million; Wikipedia: Names of large numbers; BIPM SI Brochure, 9th edition (2019)
Related conversions
- Millions to quadrillions (reverse)
- Quadrillions to pieces
- Quadrillions to dozens
- Quadrillions to lakhs
- Quadrillions to crores
- Quadrillions to billions (short scale)
- Pieces to millions
- Dozens to millions
- Lakhs to millions
- Crores to millions
- Billions (short scale) to millions
- Pairs to millions
- Hundred to millions
- Gross to millions
- Thousand to millions
- Trillions (short scale) to millions
- Score to millions
- Half dozens to millions
See all counting & quantity units.