Calculator Caddy

One handy place for the numbers you reach for all day.

Measurements, money, projects, HVAC, electrical, plumbing, paint, and everyday conversions in one installable calculator caddy.

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Tool directory

All Calculator and Converter Tools

Browse every Calculator Caddy calculator and converter by category, or search by name. Select a tool to open it as its own focused calculator view.

Smart Measurement Calculator

Measurement 1

Feet Inches

Fraction

Operation

Measurement 2

Feet Inches

Fraction

Adjust total Adjustment number

Fraction Converter

Unit Whole amount

Fraction

Nearest fraction

Decimal Converter

Unit Decimal amount Nearest fraction

Everyday Calculators

Percentages

Percent amount Total

Shopping / Tip

Original price Discount % Sales tax % Bill amount Tip % People

Dates

Start date End date Include end date

Life Calculators

Health and date calculators are informational only and are not medical advice. Confirm pregnancy and health guidance with a qualified clinician.

Age

Birth date Age on date

Pregnancy Due Date

Last period start Cycle length days

Target Heart Rate

Age Resting HR optional Measured max HR optional

Calorie Recommendation

Age Sex Height ft Height in Current weight lb Target weight optional Weekly change lb Activity level

Area Calculator

Length

Feet Inches Fraction

Width

Feet Inches Fraction

Waste %

Volume Calculator

Length

Feet Inches Fraction

Width

Feet Inches Fraction

Depth

Feet Inches Fraction

Paint Calculator

This is an estimate based on an average gallon per square foot. If you would like the most accurate calculation, please enter the square feet per gallon from your manufacturer here.

Manufacturer sq ft per gallon Coats

Liquid Converter

Amount Unit

HVAC Calculators

Planning estimates only. For equipment sizing, use Manual J / Manual D procedures, manufacturer tables, and local code requirements.

Room CFM from ACH

Length ft Width ft Height ft Target ACH

Cooling Airflow

Cooling tons CFM per ton

Sensible Heat / Airflow

BTU/h Delta T deg F

Bathroom Exhaust

Bath length ft Bath width ft Fixtures over 100 sq ft Jetted tubs

Electrical Calculators

Reference calculations only. Electrical work must follow local code and be verified by a qualified electrician.

Watts / Amps

Volts Amps

Voltage Drop

Source volts Load amps One-way length ft Phase Material Wire size

Plumbing Calculators

Reference calculations only. Verify final pipe sizing, slope, fixture units, and code requirements locally.

Pipe Volume

Inner diameter inches Length ft

Drain Slope

Run ft Slope in/ft

Finance Calculators

Payment estimates only. Taxes, insurance, fees, lender terms, dealer fees, incentives, and credit approval can change final numbers.

Amortization Schedule

Loan amount Interest rate % Number of payments Payment frequency

Mortgage Payment

Home price Down payment Interest rate % Term years Taxes / month Insurance / month PMI / month HOA / month

Mortgage Repayment / Payoff

Current balance Interest rate % Monthly payment Extra monthly

Car Payment

Vehicle price Down payment Trade-in Tax / fees Interest rate % Term months

Car Lease Payment

MSRP / cap cost Cap reduction Residual value Money factor Term months Tax rate %

Debt Ratios

Current liabilities Long-term liabilities Current assets Long-term assets Equity Net income Interest Taxes

Pay, Tax, Savings & Checkbook

Hourly rate Regular hours Overtime hours Overtime multiplier Weeks per year Taxable income Filing status Savings goal Current savings Monthly contribution Starting checkbook balance Deposits Payments / withdrawals

Calculator requests

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