part per thousand
| Symbol: | ppt |
| Category: | Fraction |
| SI Equivalent: | 1×10-3 |
| Dimension: | nil (fraction) |
| System: | INT |
| Notes | |
| 1 ppt = 10-3 | |
1 ppt =
| Fraction | ||
| Symbol | Unit Name | |
| 2.4×10-2 | ct, Kt | carat (karat) |
| 1×106 | ppb | part per billion |
| 0.1 | pph, % | part per hundred |
| 1×105 | pphm | part per hundred million |
| 100 | ppht | part per hundred thousand |
| 1000 | ppm | part per million |
| 1×1012 | ppq | part per quadrillion |
| 1×109 | ppt | part per tera |















