Calculators

Rent math, done for you.

Type your numbers and get the answer, the working and a link that opens on the same result. Free, with no login.

Sample result

$967.74

In Oct 12, 2026 · $1,500 rent · actual days

Calculator

Prorated rent calculator

Rent for a partial month, moving in or out, worked out three ways.

Sample result

6.9%

$24,000 NOI · $350,000 price

Calculator

Cap rate calculator

NOI divided by price, or the most you can pay for the cap rate you want.

Sample result

$21,564

$36,000 rent · 5% vacancy · $12,636 expenses

Calculator

NOI calculator

Net operating income from rent, vacancy and itemized expenses.

Sample result

$1,800

30% of $6,000 a month

Calculator

Rent-to-income calculator

Can you afford it, and does it pass the 3× rule?

Sample result

+5.0%

$1,500 → $1,575 a month

Calculator

Rent increase calculator

Percent to dollars and back, the cost per year, and when it can start.

Sample result

$75.00

5% of $1,500 · 7 days late

Calculator

Late fee calculator

Flat, percent of rent or per day, counted after the grace days.

Letters

Then put it in writing.

Notices and receipts that fill in as you type, check your state’s notice period and print on one page.

All letters

Sample result

30 days

Move out by Nov 30, 2026

Letter

Notice to vacate

Tenant or landlord, 30 or 60 days, dated and ready to print.

Sample result

$1,575.00

Rent + $75 late fee

Letter

Late rent notice

What’s owed, the late fee and the pay-by date in one letter.

Sample result

$1,575 a month

Starts Jan 1, 2027

Letter

Rent increase notice

The new rent, the start date and the notice period, in writing.

Sample result

$1,500.00

Paid Oct 1, 2026 · check

Letter

Rent receipt

A dated receipt for rent paid by cash, check or transfer.