| drop (metric) | 1 drop (metric) | 2 drop (metric) | 3 drop (metric) | 4 drop (metric) | 5 drop (metric) | 6 drop (metric) | 7 drop (metric) | 8 drop (metric) | 9 drop (metric) | 10 drop (metric) | 11 drop (metric) | 12 drop (metric) | 13 drop (metric) | 14 drop (metric) | 15 drop (metric) | 16 drop (metric) | 17 drop (metric) | 18 drop (metric) | 19 drop (metric) | 20 drop (metric) | 21 drop (metric) | 22 drop (metric) | 23 drop (metric) | 24 drop (metric) | 25 drop (metric) | 26 drop (metric) | 27 drop (metric) | 28 drop (metric) | 29 drop (metric) | 30 drop (metric) | 31 drop (metric) | 32 drop (metric) | 33 drop (metric) | 34 drop (metric) | 35 drop (metric) | 36 drop (metric) | 37 drop (metric) | 38 drop (metric) | 39 drop (metric) | 40 drop (metric) | 41 drop (metric) | 42 drop (metric) | 43 drop (metric) | 44 drop (metric) | 45 drop (metric) | 46 drop (metric) | 47 drop (metric) | 48 drop (metric) | 49 drop (metric) | 50 drop (metric) | 51 drop (metric) | 52 drop (metric) | 53 drop (metric) | 54 drop (metric) | 55 drop (metric) | 56 drop (metric) | 57 drop (metric) | 58 drop (metric) | 59 drop (metric) | 60 drop (metric) | 61 drop (metric) | 62 drop (metric) | 63 drop (metric) | 64 drop (metric) | 65 drop (metric) | 66 drop (metric) | 67 drop (metric) | 68 drop (metric) | 69 drop (metric) | 70 drop (metric) | 71 drop (metric) | 72 drop (metric) | 73 drop (metric) | 74 drop (metric) | 75 drop (metric) | 76 drop (metric) | 77 drop (metric) | 78 drop (metric) | 79 drop (metric) | 80 drop (metric) | 81 drop (metric) | 82 drop (metric) | 83 drop (metric) | 84 drop (metric) | 85 drop (metric) | 86 drop (metric) | 87 drop (metric) | 88 drop (metric) | 89 drop (metric) | 90 drop (metric) | 91 drop (metric) | 92 drop (metric) | 93 drop (metric) | 94 drop (metric) | 95 drop (metric) | 96 drop (metric) | 97 drop (metric) | 98 drop (metric) | 99 drop (metric) | 100 drop (metric) |
| petaliter | 5.0 × 10-20 PL | 1.0 × 10-19 PL | 1.5 × 10-19 PL | 2.0 × 10-19 PL | 2.5 × 10-19 PL | 3.0 × 10-19 PL | 3.5 × 10-19 PL | 4.0 × 10-19 PL | 4.5 × 10-19 PL | 5.0 × 10-19 PL | 5.5 × 10-19 PL | 6.0 × 10-19 PL | 6.5 × 10-19 PL | 7.0 × 10-19 PL | 7.5 × 10-19 PL | 8.0 × 10-19 PL | 8.5 × 10-19 PL | 9.0 × 10-19 PL | 9.5 × 10-19 PL | 1.0 × 10-18 PL | 1.05 × 10-18 PL | 1.1 × 10-18 PL | 1.15 × 10-18 PL | 1.2 × 10-18 PL | 1.25 × 10-18 PL | 1.3 × 10-18 PL | 1.35 × 10-18 PL | 1.4 × 10-18 PL | 1.45 × 10-18 PL | 1.5 × 10-18 PL | 1.55 × 10-18 PL | 1.6 × 10-18 PL | 1.65 × 10-18 PL | 1.7 × 10-18 PL | 1.75 × 10-18 PL | 1.8 × 10-18 PL | 1.85 × 10-18 PL | 1.9 × 10-18 PL | 1.95 × 10-18 PL | 2.0 × 10-18 PL | 2.05 × 10-18 PL | 2.1 × 10-18 PL | 2.15 × 10-18 PL | 2.2 × 10-18 PL | 2.25 × 10-18 PL | 2.3 × 10-18 PL | 2.35 × 10-18 PL | 2.4 × 10-18 PL | 2.45 × 10-18 PL | 2.5 × 10-18 PL | 2.55 × 10-18 PL | 2.6 × 10-18 PL | 2.65 × 10-18 PL | 2.7 × 10-18 PL | 2.75 × 10-18 PL | 2.8 × 10-18 PL | 2.85 × 10-18 PL | 2.9 × 10-18 PL | 2.95 × 10-18 PL | 3.0 × 10-18 PL | 3.05 × 10-18 PL | 3.1 × 10-18 PL | 3.15 × 10-18 PL | 3.2 × 10-18 PL | 3.25 × 10-18 PL | 3.3 × 10-18 PL | 3.35 × 10-18 PL | 3.4 × 10-18 PL | 3.45 × 10-18 PL | 3.5 × 10-18 PL | 3.55 × 10-18 PL | 3.6 × 10-18 PL | 3.65 × 10-18 PL | 3.7 × 10-18 PL | 3.75 × 10-18 PL | 3.8 × 10-18 PL | 3.85 × 10-18 PL | 3.9 × 10-18 PL | 3.95 × 10-18 PL | 4.0 × 10-18 PL | 4.05 × 10-18 PL | 4.1 × 10-18 PL | 4.15 × 10-18 PL | 4.2 × 10-18 PL | 4.25 × 10-18 PL | 4.3 × 10-18 PL | 4.35 × 10-18 PL | 4.4 × 10-18 PL | 4.45 × 10-18 PL | 4.5 × 10-18 PL | 4.55 × 10-18 PL | 4.6 × 10-18 PL | 4.65 × 10-18 PL | 4.7 × 10-18 PL | 4.75 × 10-18 PL | 4.8 × 10-18 PL | 4.85 × 10-18 PL | 4.9 × 10-18 PL | 4.95 × 10-18 PL | 5.0 × 10-18 PL |
The drop is an approximated unit of measure of volume, the amount dispensed as one drop from a dropper or drip chamber. It is often used in giving quantities of liquid drugs to patients, and occasionally in cooking.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| drop (metric) | ≡ 1⁄20 mL | = 50.0×10−9 m3 | Imperial/US |
| drops (metric) | petaliters | drops (metric) | petaliters |
|---|---|---|---|
| 1 | = 5.0E-20 | 6 | = 3.0E-19 |
| 2 | = 1.0E-19 | 7 | = 3.5E-19 |
| 3 | = 1.5E-19 | 8 | = 4.0E-19 |
| 4 | = 2.0E-19 | 9 | = 4.5E-19 |
| 5 | = 2.5E-19 | 10 | = 5.0E-19 |
The petaliter or petalitre is a common metric unit of volume. It is equal to 1 000 000 000 000 cubic meters. Plural name is petaliters.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| petaliter | PL | ≡ 103 km3 | ≡ 1 000 000 000 000 m3 | Metric system SI |
| petaliters | drops (metric) | petaliters | drops (metric) |
|---|---|---|---|
| 1 | = 2.0E+19 | 6 | = 1.2E+20 |
| 2 | = 4.0E+19 | 7 | = 1.4E+20 |
| 3 | = 6.0E+19 | 8 | = 1.6E+20 |
| 4 | = 8.0E+19 | 9 | = 1.8E+20 |
| 5 | = 1.0E+20 | 10 | = 2.0E+20 |
| drops (metric) | petaliters |
|---|---|
| 1 | = 5.0 × 10-20 |
| 2.0 × 1019 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |