BLADEFEED / Planning tools
Make a plan you can use.
Turn your own numbers into a session plan. Compare a wheel measurement, estimate time or prepare a filming decision. These tools calculate from your inputs; they do not rate your skill, inspect equipment or report current park prices.
Your answers stay on this page. These calculators do not send or store your inputs.
How to use the tools
Choose the question you actually need to answer. Check units, enter your own values and compare the result with the example. Prices and times below are hypothetical. Before booking a visit, confirm access, opening and prices with the venue. A calculation is a planning aid, not a product compatibility check.
Wheel circumference
Compare the geometry of a wheel diameter. Wear, deformation and slip change real travel; this does not decide whether the wheel fits your frame.
C = π × diameter. Revolutions per km = 1,000,000 / C.
60 mm → 188.50 mm circumference and about 5,305.16 revolutions per km.
Your annual skate budget
Add your own equipment, parts, visit and travel estimates. Use the same currency for every field. These example amounts are not current shop or park prices.
Total = equipment + parts + visits × fee + travel.
200 + 100 + 40 × 10 + 200 = €900.
Time left on a day trip
Budget a return journey explicitly. Enter the same one-way time for both directions only if that assumption fits your route. Transfers include all extra travel between stops.
Available = window − 2 × one-way journey − transfers − breaks.
360 − 2 × 45 − 30 − 45 = 195 minutes.
Intentional slow motion
This models one captured frame per playback frame without interpolation. Use actual frame rates; variable-rate clips need checking in your editor. Equal rates keep the original duration.
Speed (%) = 100 × playback / capture. New duration = duration × capture / playback.
60 → 30 fps: 50% speed; a four-second clip becomes eight seconds.
Approximate video storage
Enter the average total bitrate, including audio if known. This estimates encoded data; real files vary with bitrate, container and metadata. Decimal MB is not MiB.
MB = bitrate × seconds / 8. GB = MB / 1,000.
20 Mb/s × 60 s / 8 = 150 MB = 0.15 GB.
Your cost per session
Divide a total you choose by sessions in that same period. State which costs are included. A result is your average, not a standard cost or estimate for another rider.
Cost per session = included costs / number of sessions.
€120 / 12 sessions = €10 per session.
A short session timebox
Set aside arrival, breaks and a recap before planning activities. The remaining time is a planning interval, not a recommendation to practise continuously or attempt a particular trick.
Available = total − arrival − breaks − recap.
45 − 8 − 5 − 5 = 27 minutes to allocate.
Four-wheel set and spare costs
Use one currency throughout. A set here means four wheels, not a complete eight-wheel setup. Shipping is added once; tax or fitting is included only if you put it in your price.
One set = 4 × price. Total = (4 × sets + spares) × price + shipping.
€8 × (4 × 2 + 2) + €5 = €85; one four-wheel set costs €32 before shipping.
Compare two travel options
Enter complete return-trip estimates for options A and B, including waiting and transfers. Costs are for the same number of people. Compare time, cost and changes separately; this does not check a timetable, accessibility or skate carriage.
Differences A − B are shown separately; negative means A uses less of that quantity.
A: 90 min, €12, 2 changes. B: 60 min, €20, 0 changes. A costs €8 less and takes 30 min longer.
Printable planning sheets
These sheets print with the source links. They do not submit a correction or create an account.
Your skate passport
Write down the exact model and manufacturer reference rather than guessing compatibility. Keep this sheet with your own records; blanks are yours to complete.
| Question | Your notes |
|---|---|
| Skate / shell model and size | |
| Liner model and size | |
| Frame model and mount reference | |
| Wheel diameter / hardness / quantity | |
| Bearing and spacer reference | |
| Axle or replacement-part reference | |
| Manufacturer instructions URL | |
| Date checked and remaining questions |
A useful correction
Help the Journal check one concrete detail. Record the page, the exact statement, what should change, and a primary source. For a venue, include the date you checked its official information.
| Question | Your notes |
|---|---|
| Journal page URL | |
| Statement or field to correct | |
| Proposed correction | |
| Official source URL | |
| Date the source was checked | |
| What remains unconfirmed |
Numbers and assumptions
Wheel calculations model a circle and ideal rolling. Timing subtracts the intervals you enter. Budgets add only your entered costs. Video size uses average total bitrate with decimal MB and GB. Slow motion deliberately maps each captured frame to one playback frame: it does not add captured detail or promise your phone supports the chosen rate.
Read the full guides
- How to plan a rollerblading day trip without overloading the day
- Organise your rollerblading clips before you open the editor
- Pack for a skate session without carrying your entire room
- Plan a useful rollerblading session when you only have 45 minutes
- Inline wheel diameter and hardness: read the label before replacing wheels
- Buying used aggressive skates: inspection and seller questions
- Skate video frame rates: calculate slow motion before filming
Source and context
The calculations and illustrative examples are original arithmetic. The linked Journal guides explain equipment checks and filming decisions. Adobe documents intentional frame-rate interpretation; check the actual media properties in your editor.
More practical tools
Session organisers: roles, packing, reading, verification and maintenance →
Numbered skate anatomy and compatibility evidence path →
31 starting and reflection worksheets: fill in, export and print →