diff --git a/Project.toml b/Project.toml
index 695fb206..1f0a6779 100644
--- a/Project.toml
+++ b/Project.toml
@@ -9,21 +9,27 @@ PackageExtensionCompat = "65ce6f38-6b18-4e1d-a461-8949797d7930"
 Tricks = "410a4b4d-49e4-4fbc-ab6d-cb71b17b3775"
 
 [weakdeps]
+DiffEqBase = "2b5f629d-d688-5b77-993f-72d75c75574e"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 Measurements = "eff96d63-e80a-5855-80a2-b1b0885c5ab7"
+RecursiveArrayTools = "731186ca-8d62-57ce-b412-fbd966d074cd"
 ScientificTypes = "321657f4-b219-11e9-178b-2701a2544e81"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 
 [extensions]
+DynamicQuantitiesDiffEqBaseExt = "DiffEqBase"
 DynamicQuantitiesLinearAlgebraExt = "LinearAlgebra"
 DynamicQuantitiesMeasurementsExt = "Measurements"
+DynamicQuantitiesRecursiveArrayToolsExt = "RecursiveArrayTools"
 DynamicQuantitiesScientificTypesExt = "ScientificTypes"
 DynamicQuantitiesUnitfulExt = "Unitful"
 
 [compat]
 Compat = "3.42, 4"
+DiffEqBase = "6"
 Measurements = "2"
 PackageExtensionCompat = "1.0.2"
+RecursiveArrayTools = "2"
 ScientificTypes = "3"
 Tricks = "0.1"
 Unitful = "1"
@@ -31,9 +37,11 @@ julia = "1.6"
 
 [extras]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
+DiffEqBase = "2b5f629d-d688-5b77-993f-72d75c75574e"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 Measurements = "eff96d63-e80a-5855-80a2-b1b0885c5ab7"
 Ratios = "c84ed2f1-dad5-54f0-aa8e-dbefe2724439"
+RecursiveArrayTools = "731186ca-8d62-57ce-b412-fbd966d074cd"
 SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
 SaferIntegers = "88634af6-177f-5301-88b8-7819386cfa38"
 ScientificTypes = "321657f4-b219-11e9-178b-2701a2544e81"
@@ -42,4 +50,4 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 
 [targets]
-test = ["Aqua", "LinearAlgebra", "Measurements", "Ratios", "SaferIntegers", "SafeTestsets", "ScientificTypes", "StaticArrays", "Test", "Unitful"]
+test = ["Aqua", "DiffEqBase", "LinearAlgebra", "Measurements", "Ratios", "RecursiveArrayTools", "SaferIntegers", "SafeTestsets", "ScientificTypes", "StaticArrays", "Test", "Unitful"]
diff --git a/ext/DynamicQuantitiesDiffEqBaseExt.jl b/ext/DynamicQuantitiesDiffEqBaseExt.jl
new file mode 100644
index 00000000..cd8e2c93
--- /dev/null
+++ b/ext/DynamicQuantitiesDiffEqBaseExt.jl
@@ -0,0 +1,22 @@
+module DynamicQuantitiesDiffEqBaseExt
+
+using DynamicQuantities: 
+    UnionAbstractQuantity, ustrip, QuantityArray
+
+import DiffEqBase
+
+DiffEqBase.value(x::UnionAbstractQuantity) = ustrip(x)
+DiffEqBase.recursive_length(u::UnionAbstractQuantity) = recursive_length(ustrip(u))
+DiffEqBase.recursive_length(u::QuantityArray) = recursive_length(ustrip(u))
+
+@inline function DiffEqBase.UNITLESS_ABS2(x::UnionAbstractQuantity)
+    abs2(ustrip(x))
+end
+function DiffEqBase.abs2_and_sum(x::UnionAbstractQuantity, y)
+    reduce(Base.add_sum, ustrip(x), init = zero(real(DiffEqBase.value(x)))) +
+        reduce(Base.add_sum, y, init = zero(real(DiffEqBase.value(eltype(y)))))
+end
+
+DiffEqBase.NAN_CHECK(x::UnionAbstractQuantity) = NAN_CHECK(ustrip(x))
+
+end
\ No newline at end of file
diff --git a/ext/DynamicQuantitiesRecursiveArrayToolsExt.jl b/ext/DynamicQuantitiesRecursiveArrayToolsExt.jl
new file mode 100644
index 00000000..9190402e
--- /dev/null
+++ b/ext/DynamicQuantitiesRecursiveArrayToolsExt.jl
@@ -0,0 +1,13 @@
+module DynamicQuantitiesRecursiveArrayToolsExt
+
+import DynamicQuantities: AbstractQuantity
+import RecursiveArrayTools: RecursiveArrayTools as RAT
+
+function RAT.recursive_unitless_bottom_eltype(::Type{Q}) where {T,Q<:AbstractQuantity{T}}
+    return T
+end
+function RAT.recursive_unitless_eltype(::Type{Q}) where {T,Q<:AbstractQuantity{T}}
+    return T
+end
+
+end
diff --git a/src/math.jl b/src/math.jl
index 3fb8e03b..d2bb0085 100644
--- a/src/math.jl
+++ b/src/math.jl
@@ -133,6 +133,7 @@ Base.cbrt(q::UnionAbstractQuantity) = new_quantity(typeof(q), cbrt(ustrip(q)), c
 
 Base.abs2(q::UnionAbstractQuantity) = new_quantity(typeof(q), abs2(ustrip(q)), dimension(q)^2)
 Base.angle(q::UnionAbstractQuantity{T}) where {T<:Complex} = angle(ustrip(q))
+Base.sign(q::UnionAbstractQuantity) = sign(ustrip(q))
 
 ############################## Require dimensionless input ##############################
 # Note that :clamp, :cmp, :sign already work
diff --git a/src/utils.jl b/src/utils.jl
index d31791a4..161017b9 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -88,6 +88,7 @@ single value type.
 end
 @inline promote_except_value(q1::Q, q2::Q) where {Q<:UnionAbstractQuantity} = (q1, q2)
 
+Base.eltype(::Type{Q}) where {Q<:UnionAbstractQuantity} = Q
 Base.keys(d::AbstractDimensions) = dimension_names(typeof(d))
 Base.getindex(d::AbstractDimensions, k::Symbol) = getfield(d, k)
 
@@ -182,6 +183,7 @@ Base.zero(q::Q) where {Q<:UnionAbstractQuantity} = new_quantity(Q, zero(ustrip(q
 Base.zero(::AbstractDimensions) = error("There is no such thing as an additive identity for a `AbstractDimensions` object, as + is only defined for `UnionAbstractQuantity`.")
 Base.zero(::Type{<:UnionAbstractQuantity}) = error("Cannot create an additive identity for a `UnionAbstractQuantity` type, as the dimensions are unknown. Please use `zero(::UnionAbstractQuantity)` instead.")
 Base.zero(::Type{<:AbstractDimensions}) = error("There is no such thing as an additive identity for a `AbstractDimensions` type, as + is only defined for `UnionAbstractQuantity`.")
+Base.zero(x::Array{Q}) where {Q<:UnionAbstractQuantity} = zero.(x)
 
 # Dimensionful 1 (oneunit)
 Base.oneunit(q::Q) where {Q<:UnionAbstractQuantity} = new_quantity(Q, oneunit(ustrip(q)), dimension(q))
diff --git a/test/unittests.jl b/test/unittests.jl
index f7636d19..e4566e12 100644
--- a/test/unittests.jl
+++ b/test/unittests.jl
@@ -4,6 +4,7 @@ using DynamicQuantities: DEFAULT_DIM_BASE_TYPE, DEFAULT_DIM_TYPE, DEFAULT_VALUE_
 using DynamicQuantities: array_type, value_type, dim_type, quantity_type
 using DynamicQuantities: GenericQuantity
 using Ratios: SimpleRatio
+using RecursiveArrayTools: RecursiveArrayTools as RAT
 using SaferIntegers: SafeInt16
 using StaticArrays: SArray, MArray
 using LinearAlgebra: norm
@@ -1261,3 +1262,11 @@ end
         end
     end
 end
+
+@testset "RecursiveArrayTools" begin
+    for f in (RAT.recursive_unitless_bottom_eltype, RAT.recursive_unitless_eltype)
+        @test f([0.3u"km/s"]) == Float64
+        @test f([Quantity{Float32}(0.3u"km/s")]) == Float64
+        @test f([0.3Unitful.u"km/s"]) == Float64
+    end
+end