| 1 ng/L | = 4.3696799965357E-7 gr/ft3 |
| 2 ng/L | = 8.7393599930714E-7 gr/ft3 |
| 3 ng/L | = 1.3109039989607E-6 gr/ft3 |
| 4 ng/L | = 1.7478719986143E-6 gr/ft3 |
| 5 ng/L | = 2.1848399982679E-6 gr/ft3 |
| 6 ng/L | = 2.6218079979214E-6 gr/ft3 |
| 7 ng/L | = 3.058775997575E-6 gr/ft3 |
| 8 ng/L | = 3.4957439972286E-6 gr/ft3 |
| 9 ng/L | = 3.9327119968821E-6 gr/ft3 |
| 10 ng/L | = 4.3696799965357E-6 gr/ft3 |
| 20 ng/L | = 8.7393599930714E-6 gr/ft3 |
| 30 ng/L | = 1.3109039989607E-5 gr/ft3 |
| 40 ng/L | = 1.7478719986143E-5 gr/ft3 |
| 50 ng/L | = 2.1848399982679E-5 gr/ft3 |
| 60 ng/L | = 2.6218079979214E-5 gr/ft3 |
| 70 ng/L | = 3.058775997575E-5 gr/ft3 |
| 80 ng/L | = 3.4957439972286E-5 gr/ft3 |
| 90 ng/L | = 3.9327119968821E-5 gr/ft3 |
| 100 ng/L | = 4.3696799965357E-5 gr/ft3 |
| 200 ng/L | = 8.7393599930714E-5 gr/ft3 |
| 300 ng/L | = 0.00013109039989607 gr/ft3 |
| 400 ng/L | = 0.00017478719986143 gr/ft3 |
| 500 ng/L | = 0.00021848399982679 gr/ft3 |
| 600 ng/L | = 0.00026218079979214 gr/ft3 |
| 700 ng/L | = 0.0003058775997575 gr/ft3 |
| 800 ng/L | = 0.00034957439972286 gr/ft3 |
| 900 ng/L | = 0.00039327119968821 gr/ft3 |
| 1000 ng/L | = 0.00043696799965357 gr/ft3 |
| 2000 ng/L | = 0.00087393599930714 gr/ft3 |
| 4000 ng/L | = 0.0017478719986143 gr/ft3 |
| 5000 ng/L | = 0.0021848399982679 gr/ft3 |
| 7500 ng/L | = 0.0032772599974018 gr/ft3 |
| 10000 ng/L | = 0.0043696799965357 gr/ft3 |
| 25000 ng/L | = 0.010924199991339 gr/ft3 |
| 50000 ng/L | = 0.021848399982679 gr/ft3 |
| 100000 ng/L | = 0.043696799965357 gr/ft3 |
| 1000000 ng/L | = 0.43696799965357 gr/ft3 |
| 1000000000 ng/L | = 436.96799965357 gr/ft3 |