Irrigation Cost Calculator
Water bills add up fast in the growing season. This turns your gallons (from a usage estimate or your meter) into a clear dollar cost per watering, per month, and per season.
Formula: cost = gallons ÷ 1,000 × rate. Weekly = per-watering × days; monthly ≈ weekly × 4.33; seasonal = weekly × weeks. Use: feed in your actual gallons (meter or usage estimate) and your bill's per-1,000-gallon rate. Most utilities use tiered pricing — the marginal rate at your usage level is what matters.
FAQ
How much does it cost to water a lawn?
A 5,000 sq ft lawn watered 1 in/week uses about 3,115 gal per watering, or ~9,300 gal/month. At $5/1,000 gal that is roughly $47/month during the watering season.
Why is my water bill higher in summer?
Irrigation is the main driver of summer water use, and many utilities shift to higher tiers in peak season. A pool, leaks, or a running toilet can also add hidden volume.
How can I lower irrigation cost?
Subtract rainfall, fix leaks and misaligned heads, water early morning to cut evaporation, install drip for beds, use a smart/soil-moisture controller, and water deeply but less often.
Figures are editable example defaults for planning, not guarantees. Water needs vary by crop, soil, weather, season, and local climate — check ET data (NOAA, your state CIMIS/AgriMet network) and verify with your local extension service or agronomist.