Gel pens use gel ink in a rollerball format, ballpoints use a small rolling ball and come in refillable designs, and fountain pens use a nib with cartridges or a converter. Compare tip sizes, grip, refill availability and the paper you use most often.
The three pen types use different ink delivery systems. Start with the refill format and the page you write on, then compare grip and tip options.
Compare the formats
| Type | Ink delivery | Refill check | Good place to start |
|---|---|---|---|
| Gel | Gel ink through a rollerball tip | Confirm the exact refill code and tip size | Color options or a familiar click pen |
| Ballpoint | Ink delivered by a rolling ball | Check whether the barrel is refillable and which refill fits | Everyday carry and a retractable body |
| Fountain | Ink flows through a nib | Match cartridge or converter to the pen model | Fine or medium nib, with compatible fountain pen ink |
Specifications vary by product. For example, Pilot lists the G-2 as a refillable gel pen, while LAMY lists its Safari fountain pen with a cartridge and a compatible converter option. Pilot’s ballpoint range also includes refillable models. Check the exact product rather than assuming one brand-wide refill fits every pen.
Five checks before buying
- Refill availability: write down the model’s refill code and confirm local availability.
- Tip size: compare the listed tip or nib width with your handwriting and the space on the page.
- Grip and body: look at grip shape, pen diameter, clip and whether the pen posts or retracts.
- Paper match: test on your notebook or planner paper. For fountain pens, see paper and planner choices.
- Carry needs: consider caps, clips, pockets and whether the pen can leak or dry if stored incorrectly, following the maker’s instructions.
If a fountain pen is your first choice, continue with our beginner guide to fountain pens. Browse pens and writing.
Sources
For replacement ink, use the fountain pen refill compatibility checklist.
Common questions
Which pen is easiest to refill?
It depends on the model. Check whether the exact pen accepts a listed refill, cartridge or converter before buying.
Can a fountain pen use gel pen refills?
No. Fountain pens use compatible fountain pen ink cartridges, converters or built-in filling systems. Check the pen maker's instructions.
Which pen works with my notebook paper?
Paper and ink interact differently by pen and model. Try the pen on the paper you use most, or check the paper and pen maker's guidance.