Workshop answers, instantly
The right size. Without the search spiral.
Ask Fitwise about sockets, bolts, drill bits, taps, or metric and SAE equivalents. Get the direct answer, dimensional context, and the nearest alternatives in seconds.
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What to expect
Built around useful answers.
The answer comes first
Differences are shown, not hidden
No invented reviews or paid rankings
One question in. One clear answer out.
Conversions that understand the job.
Fitwise does more than calculate. It recognizes the hardware, finds the relevant standard, and shows enough detail to make a confident next move.
Ask in plain language
Type the question the way you would ask someone at the workbench—fractions, metric sizes, thread pitch, and all.
Get the fit, not just a conversion
Fitwise compares nearby sizes and explains which option is smaller, larger, or appropriate for the job.
See the dimensions
Clear diagrams and focused reference tables put the answer in context without sending you through a long article.
Save shop references
Keep frequently used bolt, socket, drill, and tap answers together for the next time you need them.
You ask
Closest metric socket to 9/16
Fitwise
14 mm
0.29 mm smaller
You ask
Wrench for an M8 bolt
Fitwise
13 mm
Common hex-head size
You ask
Tap drill for 1/4-20
Fitwise
#7
0.201 in diameter
From answer to reference.
Expand any result for a simple diagram, nearby standard sizes, and the table that supports the answer—without digging through filler.
Pricing
Free for quick checks. Pro for the workbench.
Choose based on how often you reach for the reference drawer.
Quick Check
For occasional repairs and sizing questions.
$0
No card required
- 10 answers per month
- Core socket, bolt, drill, and tap references
- Metric and SAE comparisons
Workbench Pro
For makers, mechanics, installers, and technicians who need repeatable answers.
$8/month
Good to know
Questions about Fitwise
Skip the guesswork
Bring your next sizing question.
Ask it plainly. Fitwise will handle the standards, comparisons, and decimal math.