Ever wonder how thin our atmosphere gets at high altitudes?

If you're interested in studying environmental effects on the atmosphere let vCalc help you examine Barometric Pressure as a function of altitude in the lower Earth atmosphere.

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Holiday Bonus ... in Iran

A student at Morgan State build a free calculator for her friends and family back in Iran. It's a simple calculator to compute their annual No-Rooz holiday bonus.

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You might not be sick after all

You got a positive result from a blood test for Zika. Could it be wrong? This formula shows why you may have a FALSE positive.

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Which is cheaper?

Have you ever had to compare $1.25 for a pound verses $2.37 for 72 oz? This calculator was built by a student to help his mom when shopping. It does the math and recommends the best price.

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