Free online calculators. The answer in one step.
152 fast, free calculators for the questions other sites skip — dog medication doses, wire gauges, AP scores, pay, ages, dates and unit conversions. No sign-up, works on any phone.
Health & Pets
- Walking Calories
- 1 Rep Max (1RM)
- Dog Benadryl Dosage
- DOTS Score
- Body Recomp
- EER Calculator
- A1C ↔ Glucose
- Weight Loss by Date
- Winter's Formula
- Corrected Sodium
- Anion Gap
- Army AFT Score
- USMC PFT / CFT
- Air Force PT Score
- Navy PRT Score
- Animal Gestation / Due Date
- Steps ↔ Miles
- Army Body Fat
- Standard Drinks
- BUN/Creatinine Ratio
- A/G Ratio / Globulin
- Centor / McIsaac Score
- TDEE
- CHA₂DS₂-VASc
- FIB-4
- A–a Gradient
- ABPI / ABI
- QTc
- Light's Criteria
- 5K in Miles
- Pace Converter
- Steps → Calories
- Walking Time
Home & Construction
- Sonotube Concrete
- Bolt Circle
- Water Line Size & GPM
- Wire Size / Ampacity
- Weight per Gallon
- Linear Feet
- Cubic Feet
- Current Divider
- Renovation Cost
- Cubic Yards (Dirt, Gravel, Mulch)
- Asphalt Tonnage
- Cord of Wood
- Paint (Gallons)
- Board Feet (Lumber)
- Concrete (Yards & Bags)
- Concrete Slab Cost
- Siding (Squares & Cost)
- Insulation (Batts & R-Value)
- Blown-In Insulation
- Cinder Block / CMU
- Roof Shingles
- Roof Replacement Cost
- Roof Pitch & Rafters
- Flooring (Sq Ft & Boxes)
- Construction Calculator
Finance
- Money Counter
- Overtime Pay
- Hourly ↔ Salary
- How Long Will My Money Last
- PTO Accrual
- TSP Growth
- Pay Raise
- Work Hours / Time Card
- 401(k) Early Withdrawal
- 401(k) / 403(b) / 457
- T-Bill Calculator
- Prorated Rent
- Percent Off / Discount
- House Flipping
- Cap Rate
- Cash-on-Cash Return
- Rental Property Cash Flow
- Mortgage Recast
- Seller Closing Costs
- Tip Calculator
- Time → Decimal
Everyday Life
Education
- High School GPA
- Cylinder Volume
- Mixed Fractions
- Punnett Square
- Dilution / Molarity
- Average & Standard Deviation
- Z-Score ↔ Percentile
- 30-60-90 Triangle
- Percentile Rank
- AP Seminar Score
- AP Stats Score
- NDA Age Eligibility
- APUSH Score
- AP World History Score
- AP Chem Score
- AP Bio Score
- AP Physics 1 Score
- AP Lang Score
- Mechanical Advantage
- Grade Calculator
- Graduation Year
- Interpolation
- Box Plot / 5-Number Summary
- Degrees of Freedom
- Stem & Leaf Plot
- Vertex Form
- Matrix Inverse
Food
Conversions
- Decimal Feet ↔ Feet & Inches
- Fuel Economy & Trip Cost
- HEX / RGB / CMYK
- M ↔ mM ↔ µM ↔ nM
- Celsius ↔ Fahrenheit
- mm ↔ Inches
- Military Time
- mL ↔ oz
- Stone ↔ lb ↔ kg
- Water Column ↔ PSI
- mAh ↔ Wh
- Bin Litres ↔ Gallons
- Julian Date
- Km ↔ Miles
- Km/h ↔ MPH
- Kg ↔ Lbs
- Inches ↔ cm
- Meters ↔ Feet
- Feet ↔ Inches
- Liters ↔ Gallons
- Cups ↔ mL
- Oz ↔ Grams
- Oz ↔ Lbs
- Grams ↔ Pounds
- Cm ↔ Feet & Inches
- Oz in a Gallon
- Sq Ft ↔ Acres
- Knots ↔ mph