Analytics
Open Analytics to see what you have printed, how long it took, what it used, and roughly what it cost. The page is organized into six tabs that all share one filter bar at the top.
The six tabs
Overview is the summary: how many prints you made, how many succeeded, how much filament and time they used, and a chart of prints over time.
Activity is about your printing habits — a calendar of active days, your current and longest streaks, how long your prints usually take, and which days and hours you tend to start them.
Printers compares your machines side by side: prints, success rate, hours run, filament used, how busy each one was, and what you have spent maintaining it.
Materials breaks your filament use down by type, brand and color, shows which spools you are getting through fastest, and estimates how long each one will last.
Costs splits your spending into filament, electricity and maintenance, shows how much a typical print costs, and how much went on prints that did not work out.
Accuracy compares what your slicer estimated against what actually happened, so you can see whether a particular printer or material consistently runs long or short.
The filter bar
Everything on the page responds to the filter bar. Pick one of the date presets or set a custom range, and narrow the results to particular printers, materials, projects or print statuses. Turn on compare to previous period to see how each figure moved against the period immediately before the one you are looking at.
Your filters and the tab you are on are stored in the page address, so you can bookmark a view or send someone the link and they will see the same selection.
Recorded values versus estimates
Every figure prefers what you actually recorded. If a print has a recorded print time or filament amount, that is what gets used; if it does not, the slicer's estimate is used instead, and the chart tells you that estimates were involved.
A 0 in a duration or an amount means not recorded, not "zero". 3D Print Log leaves those prints out of the figures that need a real measurement rather than pretending they took no time and used no plastic.
Prints without a date
A print with no start date cannot be placed on a timeline, so it is left out of anything with a date on it — the charts over time, the calendar, streaks and the day and hour breakdown. It still counts towards your all-time totals, and the page tells you how many prints are in that situation.
How success rate is worked out
Success rate is the share of finished prints that succeeded. Prints still marked Pending or Printing are left out of both the top and bottom of that sum, so the number does not drift around as prints finish. If nothing in the range has finished yet, the success rate is shown as unknown rather than as 0%.
What counts as waste
Waste is the filament and money spent on prints you marked Failed or Cancelled. Prints marked Partial Success are not counted as waste — you got something usable out of them, even if it was not perfect. If you want to look at partial successes on their own, filter by that status.
How costs are valued
Costs are estimates calculated at today's prices. Changing a spool's purchase price, your electricity rate, or a printer's wattage changes what past prints appear to have cost, because 3D Print Log does not store a price snapshot with each print.
Only spools priced in the same currency as your display currency are added up. A spool priced in another currency is left out and counted separately — 3D Print Log does not convert between currencies, because an exchange rate from an unknown date would be a guess dressed up as a number.
What to fill in so costs work
If the Costs tab is mostly empty, it is usually because one of these is missing. The tab links you straight to whichever one it needs.
On each spool, set the purchase price and the initial weight — the price alone is not enough, because the cost of a print depends on how much of the spool it used. On each printer, set the wattage. In Settings, set your electricity rate, and optionally a default filament price that is used for spools where you never entered one.
Utilization
Utilization is the share of the selected period that a printer was actually printing. Overlapping prints on the same machine are counted once, so the figure can never go above 100% — if two prints on one printer overlap, the overlap is time that machine spent printing, not double the time.
Estimate accuracy
Accuracy compares the actual value against the estimate for the same print. A result of 1.0 means the estimate was spot on, above 1.0 means it took longer or used more than predicted, and below 1.0 means it took less.
The figure shown is the middle result rather than the average. One print that ran ten times over — usually because a printer sat paused overnight — would drag an average badly, while the middle value keeps describing your typical print. Results that are wildly out are treated as data-entry mistakes and dropped, and any printer or material with fewer than five prints shows not enough data yet instead of a number that would just be noise.
Burn rate and runway
Burn rate is how many grams a day you have been using from a spool over the last 90 days, and runway is roughly how long what is left will last at that rate. If a spool has not been used recently, or its remaining weight is unknown, no runway is shown. The estimate is never projected more than a year ahead.
Exporting a chart
Every chart has a download button in its top corner. Choose Download CSV for the numbers behind the chart as a spreadsheet file, or Download PNG for a picture of the chart itself. Both are free and are generated in your browser, so nothing is sent anywhere.