Plainbook Studio

Free calculators

Simple tools that run in your browser. No sign-up and nothing is stored.

Debt Snowball Calculator

enter up to five debts and an extra monthly payment to see your payoff order, months to debt-free and estimated interest.

Sinking Fund Calculator

find how much to save each month for a goal by a target date, with optional interest.

Paycheck Budget Calculator

split each paycheck into needs, wants and savings. Defaults to 50/30/20 and you can change the percentages.

PTO Accrual Calculator

estimate your paid time off balance by year end from your accrual rate, pay periods and planned time off.

Party Budget Calculator

total cost and cost per guest for food, drinks, decor, activities, venue and a contingency.

Baby Cost Calculator

add your own one-time and monthly costs to see a first-year baby budget total.