Diono Radian 3R
All-in-One Convertible Car Seat, Rear and Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Black Storm
Price as of 2026-06-20. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$23–$117
- Mid-range:$117–$270← You are here
- Premium:$270+
Is This Right For You?
- •Risk-averse buyers — 8,186+ reviews give a highly reliable picture
- •Evenflo Maestro Sport Booster Car Seat — 46% cheaper at $120 (Score A-)
- •Graco Grows4Me 4-in-1 Convertible Car Seat — higher rated at 4.9/5 ($230)
📊 Based on data analysis of 84 products in this category.
Mubboo Score: A-
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other Baby Car Seats
Computed from live Amazon rating, review count, and price across 84 Baby Car Seats available to US consumers · last refreshed 2026-06-20.
How It Compares
This Product Diono Radian 3R | Most Popular Safety 1st Grow and Go All-in-One Slim Convertible Car Seat | Best Rated Graco Grows4Me 4-in-1 Convertible Car Seat | Best Value Evenflo Maestro Sport Booster Car Seat | |
|---|---|---|---|---|
| Price | $222.85 | $159.99 | $229.99 | $119.99 |
| Rating | 4.7/5 | 4.7/5 | 4.9/5 | 4.5/5 |
| Reviews | 8,186 | 34,635 | 5,450 | 2,907 |
| Mubboo Score | A- | A | B+ | A- |
About Diono
- 4 products in our database
- Average rating: 4.7/5 across all products
- Price range: $56.84 – $229.99
- Categories: Baby Car Seats
If not the Radian 3R, consider these
Bottom Line
Diono Radian 3R earns Mubboo Score A-. Priced at $223 — a mid-range option, below the category average of $223. Rated 4.7/5 from 8,186+ reviews. Strong buy if: risk-averse buyers.
Frequently Asked Questions
Is the Diono Radian 3R worth buying in 2026?
It earns a Mubboo Score of A-, with a 4.7/5 rating from 8,186 reviews — better than 68% of Baby Car Seats we track.
How much does the Diono Radian 3R cost?
It is currently $222.85 — mid-tier pricing for Baby Car Seats.
How does the Radian 3R compare to other Baby Car Seats?
The category's most-reviewed alternative is the Safety 1st Grow and Go All-in-One Slim Convertible Car Seat (4.7/5, 34,635 reviews, $159.99). The Radian 3R carries a Mubboo Score of A- vs A.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-20) and may change.