$20 GAL IN CIRC TANK Enroll Now $20 Calculate/Convert Flow from Gallons per Minute (GPM) to 3 Hr. 17 Enroll Now $20 Convert Flow to: Gallons-per-Minute (GPM) from Gallons-per-Hour (GPH) Enroll Now $20 Convert Flow to: Liters-per-Minute (L/Min.) from Gallons-per-Minute (GPM) Enroll Now $20 Convert Flow to: Million Gallons-per-Day (MGD) from Cubic Feet-per-Second (cfs) Enroll Now $20 GPM to 1.25 Days Enroll Now $20 Hrs & Min to GPM Enroll Now $20 Pond Gal to Inches Enroll Now $20 HP to KWH Enroll Now