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21 tools found
Date Calculator
Add or subtract years, months, weeks, and days from a date. See the resulting date, weekday, and calendar-day difference.
Date Duration Calculator
Find the calendar-day difference between two dates, with weeks and a years, months, and days breakdown. Choose whether to include the end date.
Height Converter
Convert centimeters to feet and inches, or feet and inches to centimeters. Compare meters, total inches, and decimal feet with exact unit factors.
BMI Calculator
Calculate adult BMI from metric or imperial height and weight. See the BMI value, adult screening category, and formula for ages 20 and above.
Square Footage Calculator
Calculate rectangular area in square feet, meters, yards, inches, and acres. Add or subtract an area and estimate cost from your own unit price.
Concrete Calculator
Estimate slab concrete volume from length, width, and depth. Add a waste allowance and optional density, bag yield, and pricing for your project.
Gravel and Stone Calculator
Estimate gravel, stone, sand, or soil volume for a rectangular area. Use your material density and price to calculate weight and cost.
Savings Goal Calculator
Find the monthly deposit needed to reach a savings goal at a fixed interest rate. Review contributions, interest, and a month-by-month balance schedule.
Loan Payment Calculator
Calculate fixed-rate loan payments with an optional down payment. Compare principal and interest totals, then review or export the repayment schedule.
Mortgage Calculator
Estimate fixed-rate mortgage payments, taxes, insurance, PMI, HOA, and financed fees. See the payment breakdown, loan-to-value ratio, and amortization schedule.
BC & AD Date Calculator
Measure the interval between BCE and CE dates using an explicit Gregorian or Julian calendar. Compare calendar days, weeks, years, and months across eras.
Website Inspector
Check public DNS, HTTPS, redirects, response headers, and basic page signals in one report.
DNS Lookup
Look up public A, AAAA, CNAME, MX, NS, and TXT records for a domain.
SSL Checker
Inspect a public HTTPS certificate's names, issuer, validity dates, and time until expiry.
Redirect Checker
Trace public HTTP and HTTPS redirects, with each response status, URL, and destination in order.
3PL Quote Comparison Calculator
Compare fulfillment quotes using the same order profile. Normalize storage, receiving, pick & pack, shipping, returns and monthly fees into a true cost per order.
JSON Formatter
Format, validate, and explore JSON. Clear structure, precise data, all in your browser.
Word Counter
Count words and characters, with reading and speaking estimates.
Percentage Calculator
Find percentages and changes, apply a discount or increase, and work backward from a part to its total.
UTM Builder
Build campaign URLs with consistent tracking parameters.
Unix Timestamp Converter
Convert Unix seconds or milliseconds to dates, and back.