Latest posts
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Concrete Block Calculator
Estimate the number of concrete blocks and mortar bags for a wall.
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Conception Calculator
Estimate the likely conception window and fertile days from your last period.
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Compound Interest Calculator
Add a principal, rate, term, compounding frequency and optional contributions to see the future value and total interest.
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Compost Calculator
Find how much compost you need in cubic yards, cubic feet and bags to top-dress beds, lawns and vegetable gardens.
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Common Factor Calculator
List all the factors (divisors) of a number, and check whether it’s prime.
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Commission Calculator
Enter a sale amount and rate to get the commission earned and total pay including any base salary.
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College Cost Calculator
Project the future cost of a college degree with education inflation, and the monthly savings needed.
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Circle Calculator
Enter a radius or diameter to get the area, circumference and diameter of a circle.
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CD Calculator
See the maturity value and interest earned on a certificate of deposit at a given APY.
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Cash Back or Low Interest Calculator
Compare a cash rebate at the standard rate against a low-APR financing offer to see which is cheaper.