iSmart Measure
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How to use the calculator
A full-expression scientific calculator with memory and tax shortcuts — then convert the answer into any unit in one tap.
The calculator does the math and then hands the result straight to the converter — so ‘work it out, then convert it’ is a single flow.
Type an expression
Open Calculator and type a full expression — for example 12 * 8. The running result shows live below (= 96), with the current unit context, so you can see the answer before you hit equals.
Use scientific functions and memory
Switch to Scientific for trig, logs and powers (toggle DEG/RAD), and use the memory keys — MC, MR, M+, M− — plus shortcuts like + Tax, − 10%, ½ and ×2.
Convert the answer in one tap
This is the trick that sets it apart: once you have a result, convert it into any unit in one tap — the answer flows straight into the converter, and lands in your Recent list.
Pricing a material order. A tiler multiplies 12 * 8 to get 96 ft², taps + Tax to add sales tax, then converts the area to m² in one tap to match a supplier’s metric quote — all without leaving the calculator.
After any calculation, tap convert to send the result into the unit converter — no re-typing the number.
Frequently asked questions
Is it a scientific calculator?
Yes. It handles full expressions, trig, logs, powers, DEG/RAD, memory keys and a running tape — plus handy shortcuts like +Tax and −10%.
Can I convert a calculation result?
Yes — that is the standout feature. Any result can be converted into another unit in one tap, and it is saved to your Recent list.
Is the calculator free?
Yes. The scientific calculator is part of the free core of iSmart Measure.