Bookkeeping Calculators
Accounts Payable Days Calculator
Calculate Days Payable Outstanding from accounts payable and cost of goods sold to see how long a business takes to pay its suppliers.
Break-Even Point Calculator
Calculate the break-even point in units and revenue from fixed costs, price per unit, and variable cost per unit for a product or service.
Cost of Goods Sold Calculator
Calculate Cost of Goods Sold from beginning inventory, purchases, and ending inventory to determine the direct cost of items sold in a period.
Depreciation Calculator
Calculate annual depreciation using either the straight-line method or the declining-balance method, from asset cost, salvage value, and useful life or rate.
Double Entry Balance Calculator
Compare a single debit amount against its matching credit amount to verify a journal entry follows the double-entry bookkeeping rule.
General Ledger Balance Calculator
Sum a list of debit and credit ledger entries to check whether they balance, with the exact variance shown when they don't.
Payroll Tax Calculator
Calculate simplified US federal FICA tax from gross pay, including Social Security tax, Medicare tax, and the Additional Medicare surtax where it applies.
Petty Cash Reconciliation Calculator
Reconcile a petty cash drawer by comparing expected cash against actual cash counted, from the starting float and total receipts collected.
Sales Tax Calculator
Calculate sales tax and the total price due by applying a tax rate to a purchase price, for invoicing, budgeting, or point-of-sale use.
Trial Balance Calculator
Sum debit-balance and credit-balance account totals to check whether a trial balance is in balance before financial statements are prepared.
The Day-to-Day Math That Keeps Books Balanced
Bookkeeping is less about big-picture ratios and more about the recurring entries that keep a ledger accurate — calculating depreciation each period, confirming a trial balance actually balances, and applying the right payroll and sales tax rates. These calculators handle the routine calculations that bookkeepers run every accounting cycle.
Popular Bookkeeping Calculators
Ten tools cover recurring entries and reconciliation:
- Depreciation Calculator — spreads an asset's cost over its useful life using straight-line or accelerated methods.
- Cost of Goods Sold Calculator — combines beginning inventory, purchases, and ending inventory into the COGS figure needed for gross profit.
- Break-Even Point Calculator — finds the sales volume where fixed and variable costs are fully covered.
- Payroll Tax Calculator — applies current withholding rates to gross pay for accurate payroll entries.
- Trial Balance Calculator — checks that total debits equal total credits before closing a period.
Why a Trial Balance Can Balance and Still Be Wrong
A trial balance confirms that debits equal credits, but it can't catch every kind of error — a transaction posted to the wrong account, or omitted entirely, still leaves the books numerically balanced even though they're materially incorrect. That's why trial balance checks are treated as a first-pass sanity check rather than proof of accuracy, and why general ledger reconciliation against source documents (invoices, bank statements) remains a separate, necessary step.
Frequently Asked Questions
What's the difference between straight-line and accelerated depreciation?
Straight-line spreads cost evenly across an asset's useful life, while accelerated methods front-load more depreciation into early years, which can matter significantly for tax planning.
Does sales tax apply to the same amount as COGS?
No — sales tax is calculated on the sale price to the customer, while COGS reflects what the business paid to acquire or produce the goods; the two are unrelated calculations that happen to appear on the same transaction.
Explore More
Need higher-level financial ratios too? See the Accounting Calculators, or check payroll specifics in the Salary & Payroll Calculators.