The park-owner math, done for you.
The calculations every park owner does by hand — water bills, rent caps, prorations, notices — as free tools. No signup, no JavaScript required, use them forever.
Water submeter calculator
Two meter reads and your utility's rate in, a tenant's at-cost water bill out. The no-markup math, done right.
Free toolWater billing run (reads → invoices)
Paste or upload the whole park's submeter reads, set your rates once, and get an itemized bill for every lot — print, PDF, CSV, or copy-ready texts.
Free toolLot rent increase calculator (2026 caps)
The most you can legally raise lot rent this year — Oregon and Washington caps applied to your park size and rent.
Free toolRent-increase notice generator
A clean, printable rent-increase notice with the effective date and notice period filled in. PDF download included.
Free toolRUBS calculator (master-meter split)
Split one master-meter water bill across your lots so the pennies add up exactly, with a park share held back.
Free toolProrated rent calculator
Mid-month move-in? Get the exact partial-month rent, by actual days in the month or a flat 30-day month.
Free toolPark value & profitability estimator
Lots, lot rent, and a cap rate in — annual NOI and what the park is worth out. The math buyers and lenders actually use.