8 Best Knives to Cut Watermelon 2026

This game-changing watermelon fork delivers a surprisingly satisfying slicing experience with minimal effort. The 2-in-1 design combines a sharp stainless steel blade with a built-in fork, letting you push through the fruit and retrieve neat cubes in one motion—perfect for backyard barbecues or messy-free snacking. Thanks to its 304 stainless steel construction, it resists rust and holds up well over repeated use, solving the common pain point of flimsy, bend-prone fruit tools.

In real-world testing, the slicer excels at portioning medium-sized watermelons into bite-sized cubes without juice runoff, though it struggles slightly on denser, underripe melons where more hand pressure is needed. The blade isn’t meant for full melon halving, but rather for direct serving from the rind, making it ideal for parties or solo snacking. It’s compact enough to toss in a picnic basket and simple enough for kids to use (with supervision), though it’s less effective on smaller melons where the blade can’t fully engage.

Compared to bulkier knives like the Mercer Culinary, this Tendiren fork slicer is all about convenience and portability rather than precision slicing. It’s the go-to for casual users who want fun, functional gadgetry without cleanup hassle. While it doesn’t replace a full knife for kitchen prep, it outshines most in on-the-go ease and mess-free serving—offering far more practicality than novelty for its ultra-low price point.

The DECHOUS serrated watermelon knife stands out with its bold red-and-green color scheme and smart safety sleeve, making it as stylish as it is practical. Its long, sharp serrated edge glides through thick rinds with minimal resistance, delivering clean slices without crushing the flesh—ideal for summer parties where presentation matters. The non-slip handle ensures control, even when hands are wet, directly addressing the slippery grip issues common with cheaper fruit knives.

During testing, the blade proved effective not only on watermelons but also on pineapples, cakes, and dense breads, thanks to its versatile serration pattern. At 8 inches, it offers enough length for full melon splits but remains manageable for precise cuts. The protective sleeve is a standout feature, making it safe to pack for picnics or camping—something most budget models lack. However, the blade isn’t as durable as high-carbon steel options and may require more frequent sharpening over time.

When stacked against the Dingerkit or Mercer models, this DECHOUS knife trades some long-term edge retention for vibrant design and portability. It’s best suited for home hosts and casual users who value both aesthetics and functionality. While it doesn’t match the premium feel of wood-handled knives, it delivers strong versatility and safety features that punch above its price tag.

If you’re after perfect, uniform watermelon cubes in seconds, this specialized cube cutter is engineered for that single, brilliant purpose. Its thick, reinforced stainless steel blade creates 1.1-inch cubes with a single press, transforming a messy task into a clean, elegant process—ideal for fruit platters or kid-friendly snacks. The ergonomic handle provides serious leverage, letting you slice layer by layer without hand fatigue, a major upgrade over flimsy plastic alternatives.

Real-world use confirms it works best on fully ripe, medium-sized watermelons where the flesh yields evenly to the blade. It’s not meant for halving melons or cutting irregular shapes, but for batch-prepping cubes, it outperforms standard knives. Cleaning is effortless—just rinse under water—and the BPA-free materials ensure safety for family use. That said, applying too much force can bend the frame, so technique matters: use controlled, layered pushes instead of brute force.

Compared to the windmill-style slicer (B07SR1Y4NH), this model offers greater cube consistency and sturdiness, though it lacks bonus accessories. It’s the top pick for hosting, meal prep, or anyone tired of jagged, uneven fruit chunks. While not as multi-functional as a long knife, it delivers specialized performance that justifies its niche role—especially for those who prioritize clean cuts over versatility.

The Dingerkit 9-inch melon knife enters the ring like a precision blade forged for dominance, blending high-carbon steel strength with artisanal polish. Its hand-forged 4Cr13 stainless blade (HRC56±2) holds a razor-sharp edge that slices through watermelon rinds like butter, leaving clean cuts without shredding the flesh—something most budget knives struggle with. Paired with its luxurious pakkawood handle, it offers a secure, ergonomic grip that reduces hand strain during repetitive cutting, making it a joy for large-batch prep.

In performance tests, it handled overripe, underripe, and extra-large melons with equal confidence, thanks to its extended blade length and optimal balance. It doubles effortlessly as a tomato, bread, or mango slicer, proving its worth beyond just melons. The included leather-like sheath adds premium protection, enhancing portability for outdoor events. However, its weight and size may feel excessive for users seeking a lightweight, simple tool—this is a serious kitchen implement, not a novelty gadget.

Stacked against the Mercer Culinary, it offers similar performance but with a more refined aesthetic and sharper initial edge. It’s the ideal choice for cooking enthusiasts and serious home chefs who want a do-it-all fruit knife with luxury touches. While pricier than most, it delivers professional-grade performance and craftsmanship that justifies its place as a long-term kitchen investment.

This windmill-style watermelon slicer brings a touch of whimsy and efficiency to fruit prep with its automatic, rotating blade mechanism that cores and slices in one push. The stainless steel windmill design effortlessly cuts a grid of cubes from the center of the melon, minimizing hand contact and juice mess—perfect for quick serving at poolside gatherings or kids’ snacks. Its delta hanging hole and slim profile make storage a breeze, fitting easily in kitchen drawers or camping kits.

In real use, the slicer works best when centered properly and pressed straight down—angled pressure can cause jamming or uneven cuts. It excels at cored, ready-to-eat portions but isn’t designed for full melon dissection. The blade is durable but not indestructible; forcing it through unripe melons risks bending. On the plus side, cleanup is a snap—just rinse or wipe—and the included melon baller is a thoughtful bonus, turning leftover flesh into elegant spheres for fruit salads or cocktails.

Compared to the 2-pack fork slicer, this model offers more visual appeal and dual functionality, though it’s slightly less intuitive for first-time users. It’s best for fun-focused households and gift-givers who appreciate clever kitchen gadgets with a twist. While not the most rugged option, its combo of innovation and bonus accessory makes it a standout for playful, practical use.

The Mercer Culinary 12-inch watermelon knife is the gold standard in professional melon cutting, built like a kitchen workhorse with Japanese high-carbon steel that resists dulling even after heavy use. Its long, straight blade powers through thick rinds and large melons with minimal effort, while the textured nylon handle ensures a slip-proof grip—a critical safety feature when dealing with wet fruit and forceful cuts. This is the knife commercial kitchens and serious home chefs reach for when precision and durability are non-negotiable.

Testing confirms it handles honeydew, cantaloupe, and oversized watermelons with ease, maintaining clean, even slices across the board. The blade’s length allows for smooth, continuous cuts without sawing, preserving fruit integrity. However, it must be hand-washed and dried immediately—dishwasher use will ruin the edge and handle. While it lacks a protective sleeve, its industrial-grade construction makes it worth the extra care.

Against the Dingerkit, it trades wood-handled elegance for superior durability and a longer blade, making it better for high-volume use. It’s the top choice for caterers, food prep pros, and anyone who cuts melons weekly. Though priced at the top end, it delivers unmatched longevity and performance—a true “buy it for life” tool that outclasses budget and mid-tier models in every practical way.

The SEWACC 16.5-inch serrated knife is a beast of a blade, engineered for conquering extra-large watermelons and dense fruits with minimal resistance. Its extended reach and aggressive serration allow deep, single-pass cuts through oversized melons—something shorter knives simply can’t manage. The lightweight stainless steel body keeps it agile despite its size, and the protective sleeve ensures safe transport, making it a reliable pick for tailgates, fairs, or big family barbecues.

In practice, the knife shines when slicing huge, farm-stand-sized melons or doubling as a cake, bread, or pizza cutter—its versatility is undeniable. The 1.57-inch blade width provides stability, though it can feel slightly flimsy when prying through stubborn rinds. It’s not as finely crafted as the Mercer or Dingerkit, but for its price, it delivers exceptional reach and multi-role utility. Still, it’s overkill for small kitchens or occasional use.

Compared to the DECHOUS model, it offers greater length and slicing power but sacrifices some handle comfort and blade refinement. It’s best for users with large melons and limited knife options who need one tool to do it all. While it doesn’t match premium models in edge quality, it delivers impressive reach and value—making it a smart pick for those prioritizing size and adaptability.

The 4-in-1 Watermelon Fork Slicer is a Swiss Army knife of melon prep, packing a fork, cube cutter, popsicle cutter, and ball scoop into one clever, space-saving tool. Its overlapping, foldable design makes it incredibly portable—perfect for camping, beach trips, or RV kitchens where drawer space is tight. Crafted from food-grade stainless steel and PP plastic, it’s durable enough for regular use and safe for all ages, solving the “too many tools” clutter problem in one go.

In real use, the cube cutter and fork combo works smoothly, letting you serve and eat without switching tools. The popsicle function is surprisingly effective, turning melon slabs into handheld treats, while the ball scoop adds gourmet flair to fruit salads. However, the plastic joints can feel less sturdy under heavy pressure, and the blade isn’t as sharp as standalone cutters. It’s best for light to moderate use, not heavy-duty melon dissection.

Next to the Tendiren 2-pack, this model offers far greater functionality and creative serving options. It’s ideal for outdoor adventurers, parents, and gift-givers who love multi-tasking kitchen gadgets. While not as robust as a full knife, it maximizes utility in a compact form—delivering fun, flexibility, and portability in one smart package.