Nitro ToolzProductivity calculators
Small utilities you reach for constantly.
Day Counter
Days between dates, business days, or add and subtract days.
Percentage Calculator
Percent of, percent change, increase and decrease in one place.
Unit Converter
Length, weight, volume, area and temperature with exact factors.
About these tools
Some calculations are too small to deserve a spreadsheet and too fiddly to do in your head. Counting the days to a deadline, working out a discount, or converting acres to square feet should take seconds.
The day counter handles date differences, business days and adding or subtracting days. The percentage calculator covers the five percent questions people actually ask. The unit converter uses exact conversion factors across length, weight, volume, area and temperature.
All three are free, instant and private, with shareable links so you can send someone the exact setup you used.