// multi-utility computation suite · offline · instant · precise
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sci.Fitts-law-movement-time Calculator
Calculates Fitts' law movement time MT = a + b × log₂(2D/W), where D is distance and W is target width, from empirical HCI experiment data. Fitts' law has R² > 0.95 in most pointing tasks — optimal toolbar button size balances screen space against the logarithmic movement time improvement.
Inputs
Distance Mm
Separation between two points or total path length. Check that units are consistent throughout the calculation.
Width Mm
Horizontal extent perpendicular to the length.
Mt Coefficient A
Reference formula or conversion factor shown for context.
Mt Coefficient B
Reference formula or conversion factor shown for context.
Results
index of difficulty ID (bits)
Mining difficulty — the network target that determines how hard it is to mine a valid block. Auto-adjusts to maintain consistent block times.
movement time MT (ms)
The computed duration or time value.
throughput TP (bits/s)
Amount of work completed per unit time — requests per second, MB/s, or transactions per second.
ID = log₂(2D/W)
Reference formula or conversion factor shown for context.
MT = a + b·ID
Reference formula or conversion factor shown for context.
typical throughput
Amount of work completed per unit time — requests per second, MB/s, or transactions per second.