LoomLease · the lease toolkit

Free tools for landlords, renters and investors

No login. No trial. Just the number.

  • Prorated rent
  • Cap rate
  • NOI
  • Notice to vacate
  • Late fees
  • Lessor vs lessee
  • Security deposits
  • Rent-to-income
The tools

Come for the number. Leave with the math.

Every result shows its working, and every link you copy opens on the same answer. Printable letters are on the way.

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.

Your state

The rule in your state, with the statute.

In review State rules are being reviewed. Every number will cite the statute it comes from.

  • Security deposits
  • Notice to vacate
  • Late fees
  • Rent increases
  • Landlord entry
  • Rent control
Glossary

Plain English for lease jargon.

  1. 01

    Lessor

    The owner who grants the lease. In a home rental, that’s the landlord.

  2. 02

    Lessee

    The person who rents under the lease. In a home rental, that’s the tenant.

  3. 03

    Prorated rent

    Rent for part of a month: a daily rate times the days the place is yours. Work yours out

  • Lessor
  • Lessee
  • Holdover tenant
  • Addendum
  • Guarantor
  • Cash for keys
  • NSF fee
  • Security deposit
FAQ

Straight answers

Is LoomLease free?

Yes. Every tool here is free to use, with no account, no trial and nothing to install.

Do I need to sign up?

No. There is no login. Open a calculator, type your numbers, and the answer is on the screen.

Is this legal advice?

No. LoomLease is not a law firm. The calculators do the arithmetic; your lease and your state’s law decide what actually applies. When money or a deadline is at stake, check with a local attorney or a tenant or landlord association.

Can I share a result?

Yes. Every calculator keeps your numbers in the page address. Press Copy link and send it; whoever opens it sees the same result.

What happened to the LoomLease app?

The property-management software that used to live at this address is no longer available, and there is no app login here. This site is a free lease toolkit under the same name.

No login. No trial. Just the number.

Open a calculator